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feat: Merge validation/analyzis with Bytecode
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,246 @@ | ||
| use crate::{ | ||
| eip7702::{Eip7702Bytecode, EIP7702_MAGIC_BYTES}, | ||
| BytecodeDecodeError, Eof, JumpTable, LegacyAnalyzedBytecode, LegacyRawBytecode, | ||
| EOF_MAGIC_BYTES, | ||
| }; | ||
| use core::fmt::Debug; | ||
| use primitives::{keccak256, Address, Bytes, B256, KECCAK_EMPTY}; | ||
| use std::sync::Arc; | ||
|
|
||
| /// State of the [`Bytecode`] analysis. | ||
| #[derive(Clone, Debug, PartialEq, Eq, Hash)] | ||
| #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))] | ||
| pub enum Bytecode { | ||
| /// No analysis has been performed. | ||
| LegacyRaw(LegacyRawBytecode), | ||
| /// The bytecode has been analyzed for valid jump destinations. | ||
| LegacyAnalyzed(LegacyAnalyzedBytecode), | ||
| /// Ethereum Object Format | ||
| Eof(Arc<Eof>), | ||
| /// EIP-7702 delegated bytecode | ||
| Eip7702(Eip7702Bytecode), | ||
| } | ||
|
|
||
| impl Default for Bytecode { | ||
| #[inline] | ||
| fn default() -> Self { | ||
| // Creates a new legacy analyzed [`Bytecode`] with exactly one STOP opcode. | ||
| Self::new() | ||
| } | ||
| } | ||
|
|
||
| impl Bytecode { | ||
| // Creates a new legacy analyzed [`Bytecode`] with exactly one STOP opcode. | ||
| #[inline] | ||
| pub fn new() -> Self { | ||
| Self::LegacyAnalyzed(LegacyAnalyzedBytecode::default()) | ||
| } | ||
|
|
||
| /// Return jump table if bytecode is analyzed | ||
| #[inline] | ||
| pub fn legacy_jump_table(&self) -> Option<&JumpTable> { | ||
| match &self { | ||
| Self::LegacyAnalyzed(analyzed) => Some(analyzed.jump_table()), | ||
| _ => None, | ||
| } | ||
| } | ||
|
|
||
| /// Calculate hash of the bytecode. | ||
| pub fn hash_slow(&self) -> B256 { | ||
| if self.is_empty() { | ||
| KECCAK_EMPTY | ||
| } else { | ||
| keccak256(self.original_byte_slice()) | ||
| } | ||
| } | ||
|
|
||
| /// Return reference to the EOF if bytecode is EOF. | ||
| #[inline] | ||
| pub const fn eof(&self) -> Option<&Arc<Eof>> { | ||
| match self { | ||
| Self::Eof(eof) => Some(eof), | ||
| _ => None, | ||
| } | ||
| } | ||
|
|
||
| /// Returns true if bytecode is EOF. | ||
| #[inline] | ||
| pub const fn is_eof(&self) -> bool { | ||
| matches!(self, Self::Eof(_)) | ||
| } | ||
|
|
||
| /// Returns true if bytecode is EIP-7702. | ||
| pub const fn is_eip7702(&self) -> bool { | ||
| matches!(self, Self::Eip7702(_)) | ||
| } | ||
|
|
||
| /// Creates a new legacy [`Bytecode`]. | ||
| #[inline] | ||
| pub fn new_legacy(raw: Bytes) -> Self { | ||
| Self::LegacyRaw(raw.into()) | ||
| } | ||
|
|
||
| /// Creates a new raw [`Bytecode`]. | ||
| /// | ||
| /// # Panics | ||
| /// | ||
| /// Panics if bytecode is in incorrect format. | ||
| #[inline] | ||
| pub fn new_raw(bytecode: Bytes) -> Self { | ||
| Self::new_raw_checked(bytecode).expect("Expect correct EOF bytecode") | ||
| } | ||
|
|
||
| /// Creates a new EIP-7702 [`Bytecode`] from [`Address`]. | ||
| #[inline] | ||
| pub fn new_eip7702(address: Address) -> Self { | ||
| Self::Eip7702(Eip7702Bytecode::new(address)) | ||
| } | ||
|
|
||
| /// Creates a new raw [`Bytecode`]. | ||
| /// | ||
| /// Returns an error on incorrect Bytecode format. | ||
| #[inline] | ||
| pub fn new_raw_checked(bytecode: Bytes) -> Result<Self, BytecodeDecodeError> { | ||
| let prefix = bytecode.get(..2); | ||
| match prefix { | ||
| Some(prefix) if prefix == &EOF_MAGIC_BYTES => { | ||
| let eof = Eof::decode(bytecode)?; | ||
| Ok(Self::Eof(Arc::new(eof))) | ||
| } | ||
| Some(prefix) if prefix == &EIP7702_MAGIC_BYTES => { | ||
| let eip7702 = Eip7702Bytecode::new_raw(bytecode)?; | ||
| Ok(Self::Eip7702(eip7702)) | ||
| } | ||
| _ => Ok(Self::LegacyRaw(bytecode.into())), | ||
| } | ||
| } | ||
|
|
||
| /// Perform bytecode analysis. | ||
| /// | ||
| /// The analysis finds and caches valid jump destinations for later execution as an optimization step. | ||
| /// | ||
| /// If the bytecode is already analyzed, it is returned as-is. | ||
| #[inline] | ||
| pub fn into_analyzed(self) -> Bytecode { | ||
| let Bytecode::LegacyRaw(bytecode) = self else { | ||
| return self; | ||
| }; | ||
|
|
||
| Bytecode::LegacyAnalyzed(bytecode.into_analyzed()) | ||
| } | ||
|
|
||
| /// Create new checked bytecode. | ||
| /// | ||
| /// # Safety | ||
| /// | ||
| /// Bytecode needs to end with STOP (0x00) opcode as checked bytecode assumes | ||
| /// that it is safe to iterate over bytecode without checking lengths. | ||
| pub unsafe fn new_analyzed( | ||
| bytecode: Bytes, | ||
| original_len: usize, | ||
| jump_table: JumpTable, | ||
| ) -> Self { | ||
| Self::LegacyAnalyzed(LegacyAnalyzedBytecode::new( | ||
| bytecode, | ||
| original_len, | ||
| jump_table, | ||
| )) | ||
| } | ||
|
|
||
| /// Returns a reference to the bytecode. | ||
| /// | ||
| /// In case of EOF this will be the first code section. | ||
| #[inline] | ||
| pub fn bytecode(&self) -> &Bytes { | ||
| match self { | ||
| Self::LegacyRaw(bytes) => bytes, | ||
| Self::LegacyAnalyzed(analyzed) => analyzed.bytecode(), | ||
| Self::Eof(eof) => eof | ||
| .body | ||
| .code(0) | ||
| .expect("Valid EOF has at least one code section"), | ||
| Self::Eip7702(code) => code.raw(), | ||
| } | ||
| } | ||
|
|
||
| /// Returns false if bytecode can't be executed in Interpreter. | ||
| pub fn is_execution_ready(&self) -> bool { | ||
| !matches!(self, Self::LegacyRaw(_)) | ||
| } | ||
|
|
||
| /// Returns bytes | ||
| #[inline] | ||
| pub fn bytes(&self) -> Bytes { | ||
| match self { | ||
| Self::LegacyAnalyzed(analyzed) => analyzed.bytecode().clone(), | ||
| _ => self.original_bytes(), | ||
| } | ||
| } | ||
|
|
||
| /// Returns bytes slice | ||
| #[inline] | ||
| pub fn bytes_slice(&self) -> &[u8] { | ||
| match self { | ||
| Self::LegacyAnalyzed(analyzed) => analyzed.bytecode(), | ||
| _ => self.original_byte_slice(), | ||
| } | ||
| } | ||
|
|
||
| /// Returns a reference to the original bytecode. | ||
| #[inline] | ||
| pub fn original_bytes(&self) -> Bytes { | ||
| match self { | ||
| Self::LegacyRaw(bytes) => bytes.0.clone(), | ||
| Self::LegacyAnalyzed(analyzed) => analyzed.original_bytes(), | ||
| Self::Eof(eof) => eof.raw().clone(), | ||
| Self::Eip7702(eip7702) => eip7702.raw().clone(), | ||
| } | ||
| } | ||
|
|
||
| /// Returns the original bytecode as a byte slice. | ||
| #[inline] | ||
| pub fn original_byte_slice(&self) -> &[u8] { | ||
| match self { | ||
| Self::LegacyRaw(bytes) => bytes, | ||
| Self::LegacyAnalyzed(analyzed) => analyzed.original_byte_slice(), | ||
| Self::Eof(eof) => eof.raw(), | ||
| Self::Eip7702(eip7702) => eip7702.raw(), | ||
| } | ||
| } | ||
|
|
||
| /// Returns the length of the original bytes. | ||
| #[inline] | ||
| pub fn len(&self) -> usize { | ||
| self.original_byte_slice().len() | ||
| } | ||
|
|
||
| /// Returns whether the bytecode is empty. | ||
| #[inline] | ||
| pub fn is_empty(&self) -> bool { | ||
| self.len() == 0 | ||
| } | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod tests { | ||
| use super::{Bytecode, Eof}; | ||
| use std::sync::Arc; | ||
|
|
||
| #[test] | ||
| fn eof_arc_clone() { | ||
| let eof = Arc::new(Eof::default()); | ||
| let bytecode = Bytecode::Eof(Arc::clone(&eof)); | ||
|
|
||
| // Cloning the Bytecode should not clone the underlying Eof | ||
| let cloned_bytecode = bytecode.clone(); | ||
| if let Bytecode::Eof(original_arc) = bytecode { | ||
| if let Bytecode::Eof(cloned_arc) = cloned_bytecode { | ||
| assert!(Arc::ptr_eq(&original_arc, &cloned_arc)); | ||
| } else { | ||
| panic!("Cloned bytecode is not Eof"); | ||
| } | ||
| } else { | ||
| panic!("Original bytecode is not Eof"); | ||
| } | ||
| } | ||
| } |
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