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Decouple virtual machines (#6184)

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* work in progress for splitting vms

* evm working

* Evm -> Vm

* wasm converted

* ethcore working

* test fixes
This commit is contained in:
Nikolay Volf
2017-08-01 13:37:57 +03:00
committed by GitHub
parent c4025622de
commit b7006034b1
65 changed files with 534 additions and 400 deletions
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121
ethcore/evm/src/action_params.rs
View File

@@ -1,121 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Evm input params.
use util::{Address, Bytes, U256};
use util::hash::{H256};
use util::sha3::{Hashable, SHA3_EMPTY};
use ethjson;
use {CallType};
use std::sync::Arc;
/// Transaction value
#[derive(Clone, Debug)]
pub enum ActionValue {
/// Value that should be transfered
Transfer(U256),
/// Apparent value for transaction (not transfered)
Apparent(U256)
}
impl ActionValue {
/// Returns action value as U256.
pub fn value(&self) -> U256 {
match *self {
ActionValue::Transfer(x) | ActionValue::Apparent(x) => x
}
}
/// Returns the transfer action value of the U256-convertable raw value
pub fn transfer<T: Into<U256>>(transfer_value: T) -> ActionValue {
ActionValue::Transfer(transfer_value.into())
}
/// Returns the apparent action value of the U256-convertable raw value
pub fn apparent<T: Into<U256>>(apparent_value: T) -> ActionValue {
ActionValue::Apparent(apparent_value.into())
}
}
// TODO: should be a trait, possible to avoid cloning everything from a Transaction(/View).
/// Action (call/create) input params. Everything else should be specified in Externalities.
#[derive(Clone, Debug)]
pub struct ActionParams {
/// Address of currently executed code.
pub code_address: Address,
/// Hash of currently executed code.
pub code_hash: Option<H256>,
/// Receive address. Usually equal to code_address,
/// except when called using CALLCODE.
pub address: Address,
/// Sender of current part of the transaction.
pub sender: Address,
/// Transaction initiator.
pub origin: Address,
/// Gas paid up front for transaction execution
pub gas: U256,
/// Gas price.
pub gas_price: U256,
/// Transaction value.
pub value: ActionValue,
/// Code being executed.
pub code: Option<Arc<Bytes>>,
/// Input data.
pub data: Option<Bytes>,
/// Type of call
pub call_type: CallType,
}
impl Default for ActionParams {
/// Returns default ActionParams initialized with zeros
fn default() -> ActionParams {
ActionParams {
code_address: Address::new(),
code_hash: Some(SHA3_EMPTY),
address: Address::new(),
sender: Address::new(),
origin: Address::new(),
gas: U256::zero(),
gas_price: U256::zero(),
value: ActionValue::Transfer(U256::zero()),
code: None,
data: None,
call_type: CallType::None,
}
}
}
impl From<ethjson::vm::Transaction> for ActionParams {
fn from(t: ethjson::vm::Transaction) -> Self {
let address: Address = t.address.into();
ActionParams {
code_address: Address::new(),
code_hash: Some((&*t.code).sha3()),
address: address,
sender: t.sender.into(),
origin: t.origin.into(),
code: Some(Arc::new(t.code.into())),
data: Some(t.data.into()),
gas: t.gas.into(),
gas_price: t.gas_price.into(),
value: ActionValue::Transfer(t.value.into()),
call_type: match address.is_zero() { true => CallType::None, false => CallType::Call }, // TODO @debris is this correct?
}
}
}

2
ethcore/evm/src/benches/mod.rs
View File

@@ -25,7 +25,7 @@ extern crate test;
use self::test::{Bencher, black_box};
use util::*;
use evm::action_params::ActionParams;
use vm::ActionParams;
use evm::{self, Factory, VMType};
use evm::tests::FakeExt;

70
ethcore/evm/src/call_type.rs
View File

@@ -1,70 +0,0 @@
//! EVM call types.
use rlp::{Encodable, Decodable, DecoderError, RlpStream, UntrustedRlp};
/// The type of the call-like instruction.
#[derive(Debug, PartialEq, Clone)]
pub enum CallType {
/// Not a CALL.
None,
/// CALL.
Call,
/// CALLCODE.
CallCode,
/// DELEGATECALL.
DelegateCall,
/// STATICCALL
StaticCall,
}
impl Encodable for CallType {
fn rlp_append(&self, s: &mut RlpStream) {
let v = match *self {
CallType::None => 0u32,
CallType::Call => 1,
CallType::CallCode => 2,
CallType::DelegateCall => 3,
CallType::StaticCall => 4,
};
Encodable::rlp_append(&v, s);
}
}
impl Decodable for CallType {
fn decode(rlp: &UntrustedRlp) -> Result<Self, DecoderError> {
rlp.as_val().and_then(|v| Ok(match v {
0u32 => CallType::None,
1 => CallType::Call,
2 => CallType::CallCode,
3 => CallType::DelegateCall,
4 => CallType::StaticCall,
_ => return Err(DecoderError::Custom("Invalid value of CallType item")),
}))
}
}
#[cfg(test)]
mod tests {
use rlp::*;
use super::CallType;
#[test]
fn encode_call_type() {
let ct = CallType::Call;
let mut s = RlpStream::new_list(2);
s.append(&ct);
assert!(!s.is_finished(), "List shouldn't finished yet");
s.append(&ct);
assert!(s.is_finished(), "List should be finished now");
s.out();
}
#[test]
fn should_encode_and_decode_call_type() {
let original = CallType::Call;
let encoded = encode(&original);
let decoded = decode(&encoded);
assert_eq!(original, decoded);
}
}

107
ethcore/evm/src/env_info.rs
View File

@@ -1,107 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Environment information for transaction execution.
use std::cmp;
use std::sync::Arc;
use util::{U256, Address, H256, Hashable};
use types::BlockNumber;
use ethjson;
/// Simple vector of hashes, should be at most 256 items large, can be smaller if being used
/// for a block whose number is less than 257.
pub type LastHashes = Vec<H256>;
/// Information concerning the execution environment for a message-call/contract-creation.
#[derive(Debug, Clone)]
pub struct EnvInfo {
/// The block number.
pub number: BlockNumber,
/// The block author.
pub author: Address,
/// The block timestamp.
pub timestamp: u64,
/// The block difficulty.
pub difficulty: U256,
/// The block gas limit.
pub gas_limit: U256,
/// The last 256 block hashes.
pub last_hashes: Arc<LastHashes>,
/// The gas used.
pub gas_used: U256,
}
impl Default for EnvInfo {
fn default() -> Self {
EnvInfo {
number: 0,
author: Address::default(),
timestamp: 0,
difficulty: 0.into(),
gas_limit: 0.into(),
last_hashes: Arc::new(vec![]),
gas_used: 0.into(),
}
}
}
impl From<ethjson::vm::Env> for EnvInfo {
fn from(e: ethjson::vm::Env) -> Self {
let number = e.number.into();
EnvInfo {
number: number,
author: e.author.into(),
difficulty: e.difficulty.into(),
gas_limit: e.gas_limit.into(),
timestamp: e.timestamp.into(),
last_hashes: Arc::new((1..cmp::min(number + 1, 257)).map(|i| format!("{}", number - i).as_bytes().sha3()).collect()),
gas_used: U256::default(),
}
}
}
#[cfg(test)]
mod tests {
use std::str::FromStr;
use super::*;
use util::{U256, Address};
use ethjson;
#[test]
fn it_serializes_from_json() {
let env_info = EnvInfo::from(ethjson::vm::Env {
author: ethjson::hash::Address(Address::from_str("000000f00000000f000000000000f00000000f00").unwrap()),
number: ethjson::uint::Uint(U256::from(1_112_339)),
difficulty: ethjson::uint::Uint(U256::from(50_000)),
gas_limit: ethjson::uint::Uint(U256::from(40_000)),
timestamp: ethjson::uint::Uint(U256::from(1_100))
});
assert_eq!(env_info.number, 1112339);
assert_eq!(env_info.author, Address::from_str("000000f00000000f000000000000f00000000f00").unwrap());
assert_eq!(env_info.gas_limit, 40000.into());
assert_eq!(env_info.difficulty, 50000.into());
assert_eq!(env_info.gas_used, 0.into());
}
#[test]
fn it_can_be_created_as_default() {
let default_env_info = EnvInfo::default();
assert_eq!(default_env_info.difficulty, 0.into());
}
}

147
ethcore/evm/src/evm.rs
View File

@@ -17,142 +17,8 @@
//! Evm interface.
use std::{ops, cmp, fmt};
use util::{U128, U256, U512, trie};
use action_params::ActionParams;
use {Ext};
use super::wasm;
/// Evm errors.
#[derive(Debug, Clone, PartialEq)]
pub enum Error {
/// `OutOfGas` is returned when transaction execution runs out of gas.
/// The state should be reverted to the state from before the
/// transaction execution. But it does not mean that transaction
/// was invalid. Balance still should be transfered and nonce
/// should be increased.
OutOfGas,
/// `BadJumpDestination` is returned when execution tried to move
/// to position that wasn't marked with JUMPDEST instruction
BadJumpDestination {
/// Position the code tried to jump to.
destination: usize
},
/// `BadInstructions` is returned when given instruction is not supported
BadInstruction {
/// Unrecognized opcode
instruction: u8,
},
/// `StackUnderflow` when there is not enough stack elements to execute instruction
StackUnderflow {
/// Invoked instruction
instruction: &'static str,
/// How many stack elements was requested by instruction
wanted: usize,
/// How many elements were on stack
on_stack: usize
},
/// When execution would exceed defined Stack Limit
OutOfStack {
/// Invoked instruction
instruction: &'static str,
/// How many stack elements instruction wanted to push
wanted: usize,
/// What was the stack limit
limit: usize
},
/// Built-in contract failed on given input
BuiltIn(&'static str),
/// When execution tries to modify the state in static context
MutableCallInStaticContext,
/// Likely to cause consensus issues.
Internal(String),
/// Wasm runtime error
Wasm(String),
}
impl From<Box<trie::TrieError>> for Error {
fn from(err: Box<trie::TrieError>) -> Self {
Error::Internal(format!("Internal error: {}", err))
}
}
impl From<wasm::RuntimeError> for Error {
fn from(err: wasm::RuntimeError) -> Self {
Error::Wasm(format!("Runtime error: {:?}", err))
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::Error::*;
match *self {
OutOfGas => write!(f, "Out of gas"),
BadJumpDestination { destination } => write!(f, "Bad jump destination {:x}", destination),
BadInstruction { instruction } => write!(f, "Bad instruction {:x}", instruction),
StackUnderflow { instruction, wanted, on_stack } => write!(f, "Stack underflow {} {}/{}", instruction, wanted, on_stack),
OutOfStack { instruction, wanted, limit } => write!(f, "Out of stack {} {}/{}", instruction, wanted, limit),
BuiltIn(name) => write!(f, "Built-in failed: {}", name),
Internal(ref msg) => write!(f, "Internal error: {}", msg),
MutableCallInStaticContext => write!(f, "Mutable call in static context"),
Wasm(ref msg) => write!(f, "Internal error: {}", msg),
}
}
}
/// A specialized version of Result over EVM errors.
pub type Result<T> = ::std::result::Result<T, Error>;
/// Return data buffer. Holds memory from a previous call and a slice into that memory.
#[derive(Debug)]
pub struct ReturnData {
mem: Vec<u8>,
offset: usize,
size: usize,
}
impl ::std::ops::Deref for ReturnData {
type Target = [u8];
fn deref(&self) -> &[u8] {
&self.mem[self.offset..self.offset + self.size]
}
}
impl ReturnData {
/// Create empty `ReturnData`.
pub fn empty() -> Self {
ReturnData {
mem: Vec::new(),
offset: 0,
size: 0,
}
}
/// Create `ReturnData` from give buffer and slice.
pub fn new(mem: Vec<u8>, offset: usize, size: usize) -> Self {
ReturnData {
mem: mem,
offset: offset,
size: size,
}
}
}
/// Gas Left: either it is a known value, or it needs to be computed by processing
/// a return instruction.
#[derive(Debug)]
pub enum GasLeft {
/// Known gas left
Known(U256),
/// Return or Revert instruction must be processed.
NeedsReturn {
/// Amount of gas left.
gas_left: U256,
/// Return data buffer.
data: ReturnData,
/// Apply or revert state changes on revert.
apply_state: bool
},
}
use util::{U128, U256, U512};
use vm::{Ext, Result, ReturnData, GasLeft, Error};
/// Finalization result. Gas Left: either it is a known value, or it needs to be computed by processing
/// a return instruction.
@@ -281,15 +147,6 @@ impl CostType for usize {
}
}
/// Evm interface
pub trait Evm {
/// This function should be used to execute transaction.
///
/// It returns either an error, a known amount of gas left, or parameters to be used
/// to compute the final gas left.
fn exec(&mut self, params: ActionParams, ext: &mut Ext) -> Result<GasLeft>;
}
#[cfg(test)]
mod tests {
use util::U256;

141
ethcore/evm/src/ext.rs
View File

@@ -1,141 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Interface for Evm externalities.
use util::*;
use call_type::CallType;
use env_info::EnvInfo;
use schedule::Schedule;
use evm::{self, ReturnData};
/// Result of externalities create function.
pub enum ContractCreateResult {
/// Returned when creation was successfull.
/// Contains an address of newly created contract and gas left.
Created(Address, U256),
/// Returned when contract creation failed.
/// VM doesn't have to know the reason.
Failed
}
/// Result of externalities call function.
pub enum MessageCallResult {
/// Returned when message call was successfull.
/// Contains gas left and output data.
Success(U256, ReturnData),
/// Returned when message call failed.
/// VM doesn't have to know the reason.
Failed
}
/// Specifies how an address is calculated for a new contract.
#[derive(Copy, Clone, PartialEq, Eq)]
pub enum CreateContractAddress {
/// Address is calculated from nonce and sender. Pre EIP-86 (Metropolis)
FromSenderAndNonce,
/// Address is calculated from code hash. Default since EIP-86
FromCodeHash,
/// Address is calculated from code hash and sender. Used by CREATE_P2SH instruction.
FromSenderAndCodeHash,
}
/// Externalities interface for EVMs
pub trait Ext {
/// Returns a value for given key.
fn storage_at(&self, key: &H256) -> evm::Result<H256>;
/// Stores a value for given key.
fn set_storage(&mut self, key: H256, value: H256) -> evm::Result<()>;
/// Determine whether an account exists.
fn exists(&self, address: &Address) -> evm::Result<bool>;
/// Determine whether an account exists and is not null (zero balance/nonce, no code).
fn exists_and_not_null(&self, address: &Address) -> evm::Result<bool>;
/// Balance of the origin account.
fn origin_balance(&self) -> evm::Result<U256>;
/// Returns address balance.
fn balance(&self, address: &Address) -> evm::Result<U256>;
/// Returns the hash of one of the 256 most recent complete blocks.
fn blockhash(&mut self, number: &U256) -> H256;
/// Creates new contract.
///
/// Returns gas_left and contract address if contract creation was succesfull.
fn create(&mut self, gas: &U256, value: &U256, code: &[u8], address: CreateContractAddress) -> ContractCreateResult;
/// Message call.
///
/// Returns Err, if we run out of gas.
/// Otherwise returns call_result which contains gas left
/// and true if subcall was successfull.
#[cfg_attr(feature="dev", allow(too_many_arguments))]
fn call(&mut self,
gas: &U256,
sender_address: &Address,
receive_address: &Address,
value: Option<U256>,
data: &[u8],
code_address: &Address,
output: &mut [u8],
call_type: CallType
) -> MessageCallResult;
/// Returns code at given address
fn extcode(&self, address: &Address) -> evm::Result<Arc<Bytes>>;
/// Returns code size at given address
fn extcodesize(&self, address: &Address) -> evm::Result<usize>;
/// Creates log entry with given topics and data
fn log(&mut self, topics: Vec<H256>, data: &[u8]) -> evm::Result<()>;
/// Should be called when transaction calls `RETURN` opcode.
/// Returns gas_left if cost of returning the data is not too high.
fn ret(self, gas: &U256, data: &ReturnData) -> evm::Result<U256>;
/// Should be called when contract commits suicide.
/// Address to which funds should be refunded.
fn suicide(&mut self, refund_address: &Address) -> evm::Result<()> ;
/// Returns schedule.
fn schedule(&self) -> &Schedule;
/// Returns environment info.
fn env_info(&self) -> &EnvInfo;
/// Returns current depth of execution.
///
/// If contract A calls contract B, and contract B calls C,
/// then A depth is 0, B is 1, C is 2 and so on.
fn depth(&self) -> usize;
/// Increments sstore refunds count by 1.
fn inc_sstore_clears(&mut self);
/// Decide if any more operations should be traced. Passthrough for the VM trace.
fn trace_next_instruction(&mut self, _pc: usize, _instruction: u8) -> bool { false }
/// Prepare to trace an operation. Passthrough for the VM trace.
fn trace_prepare_execute(&mut self, _pc: usize, _instruction: u8, _gas_cost: U256) {}
/// Trace the finalised execution of a single instruction.
fn trace_executed(&mut self, _gas_used: U256, _stack_push: &[U256], _mem_diff: Option<(usize, &[u8])>, _store_diff: Option<(U256, U256)>) {}
}

6
ethcore/evm/src/factory.rs
View File

@@ -17,7 +17,7 @@
//! Evm factory.
//!
use std::sync::Arc;
use evm::Evm;
use vm::Vm;
use util::U256;
use super::interpreter::SharedCache;
use super::vmtype::VMType;
@@ -33,7 +33,7 @@ impl Factory {
/// Create fresh instance of VM
/// Might choose implementation depending on supplied gas.
#[cfg(feature = "jit")]
pub fn create(&self, gas: U256) -> Box<Evm> {
pub fn create(&self, gas: U256) -> Box<Vm> {
match self.evm {
VMType::Jit => {
Box::new(super::jit::JitEvm::default())
@@ -49,7 +49,7 @@ impl Factory {
/// Create fresh instance of VM
/// Might choose implementation depending on supplied gas.
#[cfg(not(feature = "jit"))]
pub fn create(&self, gas: U256) -> Box<Evm> {
pub fn create(&self, gas: U256) -> Box<Vm> {
match self.evm {
VMType::Interpreter => if Self::can_fit_in_usize(gas) {
Box::new(super::interpreter::Interpreter::<usize>::new(self.evm_cache.clone()))

22
ethcore/evm/src/interpreter/gasometer.rs
View File

@@ -17,15 +17,15 @@
use util::*;
use super::u256_to_address;
use {evm, ext};
use {evm, vm};
use instructions::{self, Instruction, InstructionInfo};
use interpreter::stack::Stack;
use schedule::Schedule;
use vm::Schedule;
macro_rules! overflowing {
($x: expr) => {{
let (v, overflow) = $x;
if overflow { return Err(evm::Error::OutOfGas); }
if overflow { return Err(vm::Error::OutOfGas); }
v
}}
}
@@ -59,16 +59,16 @@ impl<Gas: evm::CostType> Gasometer<Gas> {
}
}
pub fn verify_gas(&self, gas_cost: &Gas) -> evm::Result<()> {
pub fn verify_gas(&self, gas_cost: &Gas) -> vm::Result<()> {
match &self.current_gas < gas_cost {
true => Err(evm::Error::OutOfGas),
true => Err(vm::Error::OutOfGas),
false => Ok(())
}
}
/// How much gas is provided to a CALL/CREATE, given that we need to deduct `needed` for this operation
/// and that we `requested` some.
pub fn gas_provided(&self, schedule: &Schedule, needed: Gas, requested: Option<U256>) -> evm::Result<Gas> {
pub fn gas_provided(&self, schedule: &Schedule, needed: Gas, requested: Option<U256>) -> vm::Result<Gas> {
// Try converting requested gas to `Gas` (`U256/u64`)
// but in EIP150 even if we request more we should never fail from OOG
let requested = requested.map(Gas::from_u256);
@@ -107,12 +107,12 @@ impl<Gas: evm::CostType> Gasometer<Gas> {
/// it will be the amount of gas that the current context provides to the child context.
pub fn requirements(
&mut self,
ext: &ext::Ext,
ext: &vm::Ext,
instruction: Instruction,
info: &InstructionInfo,
stack: &Stack<U256>,
current_mem_size: usize,
) -> evm::Result<InstructionRequirements<Gas>> {
) -> vm::Result<InstructionRequirements<Gas>> {
let schedule = ext.schedule();
let tier = instructions::get_tier_idx(info.tier);
let default_gas = Gas::from(schedule.tier_step_gas[tier]);
@@ -291,7 +291,7 @@ impl<Gas: evm::CostType> Gasometer<Gas> {
})
}
fn mem_gas_cost(&self, schedule: &Schedule, current_mem_size: usize, mem_size: &Gas) -> evm::Result<(Gas, Gas, usize)> {
fn mem_gas_cost(&self, schedule: &Schedule, current_mem_size: usize, mem_size: &Gas) -> vm::Result<(Gas, Gas, usize)> {
let gas_for_mem = |mem_size: Gas| {
let s = mem_size >> 5;
// s * memory_gas + s * s / quad_coeff_div
@@ -319,12 +319,12 @@ impl<Gas: evm::CostType> Gasometer<Gas> {
#[inline]
fn mem_needed_const<Gas: evm::CostType>(mem: &U256, add: usize) -> evm::Result<Gas> {
fn mem_needed_const<Gas: evm::CostType>(mem: &U256, add: usize) -> vm::Result<Gas> {
Gas::from_u256(overflowing!(mem.overflowing_add(U256::from(add))))
}
#[inline]
fn mem_needed<Gas: evm::CostType>(offset: &U256, size: &U256) -> evm::Result<Gas> {
fn mem_needed<Gas: evm::CostType>(offset: &U256, size: &U256) -> vm::Result<Gas> {
if size.is_zero() {
return Ok(Gas::from(0));
}

2
ethcore/evm/src/interpreter/memory.rs
View File

@@ -15,7 +15,7 @@
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use util::U256;
use {ReturnData};
use vm::ReturnData;
const MAX_RETURN_WASTE_BYTES: usize = 16384;

42
ethcore/evm/src/interpreter/mod.rs
View File

@@ -23,17 +23,21 @@ mod stack;
mod memory;
mod shared_cache;
use std::marker::PhantomData;
use vm::{
self, ActionParams, ActionValue, CallType, MessageCallResult,
ContractCreateResult, CreateContractAddress, ReturnData, GasLeft
};
use evm::CostType;
use instructions::{self, Instruction, InstructionInfo};
use self::gasometer::Gasometer;
use self::stack::{Stack, VecStack};
use self::memory::Memory;
pub use self::shared_cache::SharedCache;
use std::marker::PhantomData;
use action_params::{ActionParams, ActionValue};
use call_type::CallType;
use instructions::{self, Instruction, InstructionInfo};
use evm::{self, GasLeft, CostType, ReturnData};
use ext::{self, MessageCallResult, ContractCreateResult, CreateContractAddress};
use bit_set::BitSet;
use util::*;
@@ -107,8 +111,8 @@ pub struct Interpreter<Cost: CostType> {
_type: PhantomData<Cost>,
}
impl<Cost: CostType> evm::Evm for Interpreter<Cost> {
fn exec(&mut self, params: ActionParams, ext: &mut ext::Ext) -> evm::Result<GasLeft> {
impl<Cost: CostType> vm::Vm for Interpreter<Cost> {
fn exec(&mut self, params: ActionParams, ext: &mut vm::Ext) -> vm::Result<GasLeft> {
self.mem.clear();
let mut informant = informant::EvmInformant::new(ext.depth());
@@ -205,7 +209,7 @@ impl<Cost: CostType> Interpreter<Cost> {
}
}
fn verify_instruction(&self, ext: &ext::Ext, instruction: Instruction, info: &InstructionInfo, stack: &Stack<U256>) -> evm::Result<()> {
fn verify_instruction(&self, ext: &vm::Ext, instruction: Instruction, info: &InstructionInfo, stack: &Stack<U256>) -> vm::Result<()> {
let schedule = ext.schedule();
if (instruction == instructions::DELEGATECALL && !schedule.have_delegate_call) ||
@@ -214,25 +218,25 @@ impl<Cost: CostType> Interpreter<Cost> {
((instruction == instructions::RETURNDATACOPY || instruction == instructions::RETURNDATASIZE) && !schedule.have_return_data) ||
(instruction == instructions::REVERT && !schedule.have_revert) {
return Err(evm::Error::BadInstruction {
return Err(vm::Error::BadInstruction {
instruction: instruction
});
}
if info.tier == instructions::GasPriceTier::Invalid {
return Err(evm::Error::BadInstruction {
return Err(vm::Error::BadInstruction {
instruction: instruction
});
}
if !stack.has(info.args) {
Err(evm::Error::StackUnderflow {
Err(vm::Error::StackUnderflow {
instruction: info.name,
wanted: info.args,
on_stack: stack.size()
})
} else if stack.size() - info.args + info.ret > schedule.stack_limit {
Err(evm::Error::OutOfStack {
Err(vm::Error::OutOfStack {
instruction: info.name,
wanted: info.ret - info.args,
limit: schedule.stack_limit
@@ -272,12 +276,12 @@ impl<Cost: CostType> Interpreter<Cost> {
&mut self,
gas: Cost,
params: &ActionParams,
ext: &mut ext::Ext,
ext: &mut vm::Ext,
instruction: Instruction,
code: &mut CodeReader,
stack: &mut Stack<U256>,
provided: Option<Cost>
) -> evm::Result<InstructionResult<Cost>> {
) -> vm::Result<InstructionResult<Cost>> {
match instruction {
instructions::JUMP => {
let jump = stack.pop_back();
@@ -593,13 +597,13 @@ impl<Cost: CostType> Interpreter<Cost> {
}
}
fn verify_jump(&self, jump_u: U256, valid_jump_destinations: &BitSet) -> evm::Result<usize> {
fn verify_jump(&self, jump_u: U256, valid_jump_destinations: &BitSet) -> vm::Result<usize> {
let jump = jump_u.low_u64() as usize;
if valid_jump_destinations.contains(jump) && U256::from(jump) == jump_u {
Ok(jump)
} else {
Err(evm::Error::BadJumpDestination {
Err(vm::Error::BadJumpDestination {
destination: jump
})
}
@@ -617,7 +621,7 @@ impl<Cost: CostType> Interpreter<Cost> {
}
}
fn exec_stack_instruction(&self, instruction: Instruction, stack: &mut Stack<U256>) -> evm::Result<()> {
fn exec_stack_instruction(&self, instruction: Instruction, stack: &mut Stack<U256>) -> vm::Result<()> {
match instruction {
instructions::DUP1...instructions::DUP16 => {
let position = instructions::get_dup_position(instruction);
@@ -822,7 +826,7 @@ impl<Cost: CostType> Interpreter<Cost> {
}
},
_ => {
return Err(evm::Error::BadInstruction {
return Err(vm::Error::BadInstruction {
instruction: instruction
});
}

7
ethcore/evm/src/jit.rs
View File

@@ -19,6 +19,7 @@ use util::*;
use evmjit;
use evm::{self, GasLeft};
use evm::CallType;
use vm::{self, Vm};
/// Should be used to convert jit types to ethcore
trait FromJit<T>: Sized {
@@ -318,7 +319,7 @@ pub struct JitEvm {
context: Option<evmjit::ContextHandle>,
}
impl evm::Evm for JitEvm {
impl vm::Vm for JitEvm {
fn exec(&mut self, params: ActionParams, ext: &mut evm::Ext) -> evm::Result<GasLeft> {
// Dirty hack. This is unsafe, but we interact with ffi, so it's justified.
let ext_adapter: ExtAdapter<'static> = unsafe { ::std::mem::transmute(ExtAdapter::new(ext, params.address.clone())) };
@@ -370,8 +371,8 @@ impl evm::Evm for JitEvm {
ext.suicide(&Address::from_jit(&context.suicide_refund_address()));
Ok(GasLeft::Known(U256::from(context.gas_left())))
},
evmjit::ReturnCode::OutOfGas => Err(evm::Error::OutOfGas),
_err => Err(evm::Error::Internal)
evmjit::ReturnCode::OutOfGas => Err(vm::Error::OutOfGas),
_err => Err(vm::Error::Internal)
}
}
}

20
ethcore/evm/src/lib.rs
View File

@@ -24,11 +24,11 @@ extern crate ethjson;
extern crate rlp;
extern crate parity_wasm;
extern crate wasm_utils;
extern crate vm;
#[macro_use]
extern crate lazy_static;
#[macro_use]
extern crate log;
#[cfg(feature = "jit")]
@@ -37,14 +37,8 @@ extern crate evmjit;
#[cfg(test)]
extern crate rustc_hex;
pub mod action_params;
pub mod call_type;
pub mod env_info;
pub mod ext;
pub mod evm;
pub mod interpreter;
pub mod schedule;
pub mod wasm;
#[macro_use]
pub mod factory;
@@ -59,12 +53,12 @@ mod tests;
#[cfg(all(feature="benches", test))]
mod benches;
pub use self::action_params::ActionParams;
pub use self::call_type::CallType;
pub use self::env_info::EnvInfo;
pub use self::evm::{Evm, Error, Finalize, FinalizationResult, GasLeft, Result, CostType, ReturnData};
pub use self::ext::{Ext, ContractCreateResult, MessageCallResult, CreateContractAddress};
pub use vm::{
Schedule, CleanDustMode, EnvInfo, CallType, ActionParams, Ext,
ContractCreateResult, MessageCallResult, CreateContractAddress,
GasLeft, ReturnData
};
pub use self::evm::{Finalize, FinalizationResult, CostType};
pub use self::instructions::{InstructionInfo, INSTRUCTIONS, push_bytes};
pub use self::vmtype::VMType;
pub use self::factory::Factory;
pub use self::schedule::{Schedule, CleanDustMode};

262
ethcore/evm/src/schedule.rs
View File

@@ -1,262 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Cost schedule and other parameterisations for the EVM.
/// Definition of the cost schedule and other parameterisations for the EVM.
pub struct Schedule {
/// Does it support exceptional failed code deposit
pub exceptional_failed_code_deposit: bool,
/// Does it have a delegate cal
pub have_delegate_call: bool,
/// Does it have a CREATE_P2SH instruction
pub have_create2: bool,
/// Does it have a REVERT instruction
pub have_revert: bool,
/// VM stack limit
pub stack_limit: usize,
/// Max number of nested calls/creates
pub max_depth: usize,
/// Gas prices for instructions in all tiers
pub tier_step_gas: [usize; 8],
/// Gas price for `EXP` opcode
pub exp_gas: usize,
/// Additional gas for `EXP` opcode for each byte of exponent
pub exp_byte_gas: usize,
/// Gas price for `SHA3` opcode
pub sha3_gas: usize,
/// Additional gas for `SHA3` opcode for each word of hashed memory
pub sha3_word_gas: usize,
/// Gas price for loading from storage
pub sload_gas: usize,
/// Gas price for setting new value to storage (`storage==0`, `new!=0`)
pub sstore_set_gas: usize,
/// Gas price for altering value in storage
pub sstore_reset_gas: usize,
/// Gas refund for `SSTORE` clearing (when `storage!=0`, `new==0`)
pub sstore_refund_gas: usize,
/// Gas price for `JUMPDEST` opcode
pub jumpdest_gas: usize,
/// Gas price for `LOG*`
pub log_gas: usize,
/// Additional gas for data in `LOG*`
pub log_data_gas: usize,
/// Additional gas for each topic in `LOG*`
pub log_topic_gas: usize,
/// Gas price for `CREATE` opcode
pub create_gas: usize,
/// Gas price for `*CALL*` opcodes
pub call_gas: usize,
/// Stipend for transfer for `CALL|CALLCODE` opcode when `value>0`
pub call_stipend: usize,
/// Additional gas required for value transfer (`CALL|CALLCODE`)
pub call_value_transfer_gas: usize,
/// Additional gas for creating new account (`CALL|CALLCODE`)
pub call_new_account_gas: usize,
/// Refund for SUICIDE
pub suicide_refund_gas: usize,
/// Gas for used memory
pub memory_gas: usize,
/// Coefficient used to convert memory size to gas price for memory
pub quad_coeff_div: usize,
/// Cost for contract length when executing `CREATE`
pub create_data_gas: usize,
/// Maximum code size when creating a contract.
pub create_data_limit: usize,
/// Transaction cost
pub tx_gas: usize,
/// `CREATE` transaction cost
pub tx_create_gas: usize,
/// Additional cost for empty data transaction
pub tx_data_zero_gas: usize,
/// Aditional cost for non-empty data transaction
pub tx_data_non_zero_gas: usize,
/// Gas price for copying memory
pub copy_gas: usize,
/// Price of EXTCODESIZE
pub extcodesize_gas: usize,
/// Base price of EXTCODECOPY
pub extcodecopy_base_gas: usize,
/// Price of BALANCE
pub balance_gas: usize,
/// Price of SUICIDE
pub suicide_gas: usize,
/// Amount of additional gas to pay when SUICIDE credits a non-existant account
pub suicide_to_new_account_cost: usize,
/// If Some(x): let limit = GAS * (x - 1) / x; let CALL's gas = min(requested, limit). let CREATE's gas = limit.
/// If None: let CALL's gas = (requested > GAS ? [OOG] : GAS). let CREATE's gas = GAS
pub sub_gas_cap_divisor: Option<usize>,
/// Don't ever make empty accounts; contracts start with nonce=1. Also, don't charge 25k when sending/suicide zero-value.
pub no_empty: bool,
/// Kill empty accounts if touched.
pub kill_empty: bool,
/// Blockhash instruction gas cost.
pub blockhash_gas: usize,
/// Static Call opcode enabled.
pub have_static_call: bool,
/// RETURNDATA and RETURNDATASIZE opcodes enabled.
pub have_return_data: bool,
/// Kill basic accounts below this balance if touched.
pub kill_dust: CleanDustMode,
}
/// Dust accounts cleanup mode.
#[derive(PartialEq, Eq)]
pub enum CleanDustMode {
/// Dust cleanup is disabled.
Off,
/// Basic dust accounts will be removed.
BasicOnly,
/// Basic and contract dust accounts will be removed.
WithCodeAndStorage,
}
impl Schedule {
/// Schedule for the Frontier-era of the Ethereum main net.
pub fn new_frontier() -> Schedule {
Self::new(false, false, 21000)
}
/// Schedule for the Homestead-era of the Ethereum main net.
pub fn new_homestead() -> Schedule {
Self::new(true, true, 53000)
}
/// Schedule for the post-EIP-150-era of the Ethereum main net.
pub fn new_post_eip150(max_code_size: usize, fix_exp: bool, no_empty: bool, kill_empty: bool) -> Schedule {
Schedule {
exceptional_failed_code_deposit: true,
have_delegate_call: true,
have_create2: false,
have_revert: false,
have_return_data: false,
stack_limit: 1024,
max_depth: 1024,
tier_step_gas: [0, 2, 3, 5, 8, 10, 20, 0],
exp_gas: 10,
exp_byte_gas: if fix_exp {50} else {10},
sha3_gas: 30,
sha3_word_gas: 6,
sload_gas: 200,
sstore_set_gas: 20000,
sstore_reset_gas: 5000,
sstore_refund_gas: 15000,
jumpdest_gas: 1,
log_gas: 375,
log_data_gas: 8,
log_topic_gas: 375,
create_gas: 32000,
call_gas: 700,
call_stipend: 2300,
call_value_transfer_gas: 9000,
call_new_account_gas: 25000,
suicide_refund_gas: 24000,
memory_gas: 3,
quad_coeff_div: 512,
create_data_gas: 200,
create_data_limit: max_code_size,
tx_gas: 21000,
tx_create_gas: 53000,
tx_data_zero_gas: 4,
tx_data_non_zero_gas: 68,
copy_gas: 3,
extcodesize_gas: 700,
extcodecopy_base_gas: 700,
balance_gas: 400,
suicide_gas: 5000,
suicide_to_new_account_cost: 25000,
sub_gas_cap_divisor: Some(64),
no_empty: no_empty,
kill_empty: kill_empty,
blockhash_gas: 20,
have_static_call: false,
kill_dust: CleanDustMode::Off,
}
}
/// Schedule for the Metropolis of the Ethereum main net.
pub fn new_metropolis() -> Schedule {
let mut schedule = Self::new_post_eip150(24576, true, true, true);
schedule.have_create2 = true;
schedule.have_revert = true;
schedule.have_static_call = true;
schedule.have_return_data = true;
schedule.blockhash_gas = 350;
schedule
}
fn new(efcd: bool, hdc: bool, tcg: usize) -> Schedule {
Schedule {
exceptional_failed_code_deposit: efcd,
have_delegate_call: hdc,
have_create2: false,
have_revert: false,
have_return_data: false,
stack_limit: 1024,
max_depth: 1024,
tier_step_gas: [0, 2, 3, 5, 8, 10, 20, 0],
exp_gas: 10,
exp_byte_gas: 10,
sha3_gas: 30,
sha3_word_gas: 6,
sload_gas: 50,
sstore_set_gas: 20000,
sstore_reset_gas: 5000,
sstore_refund_gas: 15000,
jumpdest_gas: 1,
log_gas: 375,
log_data_gas: 8,
log_topic_gas: 375,
create_gas: 32000,
call_gas: 40,
call_stipend: 2300,
call_value_transfer_gas: 9000,
call_new_account_gas: 25000,
suicide_refund_gas: 24000,
memory_gas: 3,
quad_coeff_div: 512,
create_data_gas: 200,
create_data_limit: usize::max_value(),
tx_gas: 21000,
tx_create_gas: tcg,
tx_data_zero_gas: 4,
tx_data_non_zero_gas: 68,
copy_gas: 3,
extcodesize_gas: 20,
extcodecopy_base_gas: 20,
balance_gas: 20,
suicide_gas: 0,
suicide_to_new_account_cost: 0,
sub_gas_cap_divisor: None,
no_empty: false,
kill_empty: false,
blockhash_gas: 20,
have_static_call: false,
kill_dust: CleanDustMode::Off,
}
}
}
#[test]
#[cfg(test)]
fn schedule_evm_assumptions() {
let s1 = Schedule::new_frontier();
let s2 = Schedule::new_homestead();
// To optimize division we assume 2**9 for quad_coeff_div
assert_eq!(s1.quad_coeff_div, 512);
assert_eq!(s2.quad_coeff_div, 512);
}

46
ethcore/evm/src/tests.rs
View File

@@ -17,12 +17,12 @@
use std::fmt::Debug;
use rustc_hex::FromHex;
use util::*;
use action_params::{ActionParams, ActionValue};
use env_info::EnvInfo;
use call_type::CallType;
use schedule::Schedule;
use evm::{self, GasLeft, ReturnData};
use ext::{Ext, ContractCreateResult, MessageCallResult, CreateContractAddress};
use evm::{self, GasLeft};
use vm::{
self, CallType, Schedule, EnvInfo, ActionParams, ActionValue,
ReturnData, Ext, ContractCreateResult, MessageCallResult,
CreateContractAddress,
};
use factory::Factory;
use vmtype::VMType;
@@ -66,7 +66,7 @@ pub struct FakeExt {
}
// similar to the normal `finalize` function, but ignoring NeedsReturn.
fn test_finalize(res: Result<GasLeft, evm::Error>) -> Result<U256, evm::Error> {
fn test_finalize(res: Result<GasLeft, vm::Error>) -> Result<U256, vm::Error> {
match res {
Ok(GasLeft::Known(gas)) => Ok(gas),
Ok(GasLeft::NeedsReturn{..}) => unimplemented!(), // since ret is unimplemented.
@@ -80,35 +80,29 @@ impl FakeExt {
}
}
impl Default for Schedule {
fn default() -> Self {
Schedule::new_frontier()
}
}
impl Ext for FakeExt {
fn storage_at(&self, key: &H256) -> evm::Result<H256> {
fn storage_at(&self, key: &H256) -> vm::Result<H256> {
Ok(self.store.get(key).unwrap_or(&H256::new()).clone())
}
fn set_storage(&mut self, key: H256, value: H256) -> evm::Result<()> {
fn set_storage(&mut self, key: H256, value: H256) -> vm::Result<()> {
self.store.insert(key, value);
Ok(())
}
fn exists(&self, address: &Address) -> evm::Result<bool> {
fn exists(&self, address: &Address) -> vm::Result<bool> {
Ok(self.balances.contains_key(address))
}
fn exists_and_not_null(&self, address: &Address) -> evm::Result<bool> {
fn exists_and_not_null(&self, address: &Address) -> vm::Result<bool> {
Ok(self.balances.get(address).map_or(false, |b| !b.is_zero()))
}
fn origin_balance(&self) -> evm::Result<U256> {
fn origin_balance(&self) -> vm::Result<U256> {
unimplemented!()
}
fn balance(&self, address: &Address) -> evm::Result<U256> {
fn balance(&self, address: &Address) -> vm::Result<U256> {
Ok(self.balances[address])
}
@@ -152,15 +146,15 @@ impl Ext for FakeExt {
MessageCallResult::Success(*gas, ReturnData::empty())
}
fn extcode(&self, address: &Address) -> evm::Result<Arc<Bytes>> {
fn extcode(&self, address: &Address) -> vm::Result<Arc<Bytes>> {
Ok(self.codes.get(address).unwrap_or(&Arc::new(Bytes::new())).clone())
}
fn extcodesize(&self, address: &Address) -> evm::Result<usize> {
fn extcodesize(&self, address: &Address) -> vm::Result<usize> {
Ok(self.codes.get(address).map_or(0, |c| c.len()))
}
fn log(&mut self, topics: Vec<H256>, data: &[u8]) -> evm::Result<()> {
fn log(&mut self, topics: Vec<H256>, data: &[u8]) -> vm::Result<()> {
self.logs.push(FakeLogEntry {
topics: topics,
data: data.to_vec()
@@ -168,11 +162,11 @@ impl Ext for FakeExt {
Ok(())
}
fn ret(self, _gas: &U256, _data: &ReturnData) -> evm::Result<U256> {
fn ret(self, _gas: &U256, _data: &ReturnData) -> vm::Result<U256> {
unimplemented!();
}
fn suicide(&mut self, refund_address: &Address) -> evm::Result<()> {
fn suicide(&mut self, refund_address: &Address) -> vm::Result<()> {
self.suicides.insert(refund_address.clone());
Ok(())
}
@@ -211,7 +205,7 @@ fn test_stack_underflow() {
};
match err {
evm::Error::StackUnderflow {wanted, on_stack, ..} => {
vm::Error::StackUnderflow {wanted, on_stack, ..} => {
assert_eq!(wanted, 2);
assert_eq!(on_stack, 0);
}
@@ -849,7 +843,7 @@ fn test_badinstruction_int() {
};
match err {
evm::Error::BadInstruction { instruction: 0xaf } => (),
vm::Error::BadInstruction { instruction: 0xaf } => (),
_ => assert!(false, "Expected bad instruction")
}
}

62
ethcore/evm/src/wasm/call_args.rs
View File

@@ -1,62 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Wasm evm call arguments helper
use util::{U256, H160};
/// Input part of the wasm call descriptor
pub struct CallArgs {
/// Receiver of the transaction
pub address: [u8; 20],
/// Sender of the transaction
pub sender: [u8; 20],
/// Original transaction initiator
pub origin: [u8; 20],
/// Transfer value
pub value: [u8; 32],
/// call/create params
pub data: Vec<u8>,
}
impl CallArgs {
/// New contract call payload with known parameters
pub fn new(address: H160, sender: H160, origin: H160, value: U256, data: Vec<u8>) -> Self {
let mut descriptor = CallArgs {
address: [0u8; 20],
sender: [0u8; 20],
origin: [0u8; 20],
value: [0u8; 32],
data: data,
};
descriptor.address.copy_from_slice(&*address);
descriptor.sender.copy_from_slice(&*sender);
descriptor.origin.copy_from_slice(&*origin);
value.to_big_endian(&mut descriptor.value);
descriptor
}
/// Total call payload length in linear memory
pub fn len(&self) -> u32 {
self.data.len() as u32 + 92
}
}

154
ethcore/evm/src/wasm/env.rs
View File

@@ -1,154 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Wasm env module bindings
use parity_wasm::elements::ValueType::*;
use parity_wasm::interpreter::UserFunctionDescriptor;
use parity_wasm::interpreter::UserFunctionDescriptor::*;
pub const SIGNATURES: &'static [UserFunctionDescriptor] = &[
Static(
"_storage_read",
&[I32; 2],
Some(I32),
),
Static(
"_storage_write",
&[I32; 2],
Some(I32),
),
Static(
"_malloc",
&[I32],
Some(I32),
),
Static(
"_free",
&[I32],
None,
),
Static(
"gas",
&[I32],
None,
),
Static(
"_debug",
&[I32; 2],
None,
),
Static(
"_suicide",
&[I32],
None,
),
Static(
"_create",
&[I32; 4],
Some(I32),
),
Static(
"abort",
&[I32],
None,
),
Static(
"_abort",
&[],
None,
),
Static(
"invoke_vii",
&[I32; 3],
None,
),
Static(
"invoke_vi",
&[I32; 2],
None,
),
Static(
"invoke_v",
&[I32],
None,
),
Static(
"invoke_iii",
&[I32; 3],
Some(I32),
),
Static(
"___resumeException",
&[I32],
None,
),
Static(
"_rust_begin_unwind",
&[I32; 4],
None,
),
Static(
"___cxa_find_matching_catch_2",
&[],
Some(I32),
),
Static(
"___gxx_personality_v0",
&[I32; 6],
Some(I32),
),
Static(
"_emscripten_memcpy_big",
&[I32; 3],
Some(I32),
),
Static(
"___syscall140",
&[I32; 2],
Some(I32)
),
Static(
"___syscall146",
&[I32; 2],
Some(I32)
),
Static(
"___syscall54",
&[I32; 2],
Some(I32)
),
Static(
"___syscall6",
&[I32; 2],
Some(I32)
),
Static(
"_llvm_trap",
&[I32; 0],
None
),
Static(
"abortOnCannotGrowMemory",
&[I32; 0],
Some(I32)
),
Static(
"___setErrNo",
&[I32; 1],
None
),
];

159
ethcore/evm/src/wasm/mod.rs
View File

@@ -1,159 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Wasm Interpreter
mod runtime;
mod ptr;
mod call_args;
mod result;
#[cfg(test)]
mod tests;
mod env;
use std::sync::Arc;
const DEFAULT_STACK_SPACE: u32 = 5 * 1024 * 1024;
use parity_wasm::{interpreter, elements};
use parity_wasm::interpreter::ModuleInstanceInterface;
use wasm_utils;
use evm::{self, GasLeft, ReturnData};
use action_params::ActionParams;
use self::runtime::Runtime;
pub use self::runtime::Error as RuntimeError;
const DEFAULT_RESULT_BUFFER: usize = 1024;
/// Wasm interpreter instance
pub struct WasmInterpreter {
program: interpreter::ProgramInstance,
result: Vec<u8>,
}
impl WasmInterpreter {
/// New wasm interpreter instance
pub fn new() -> Result<WasmInterpreter, RuntimeError> {
Ok(WasmInterpreter {
program: interpreter::ProgramInstance::new()?,
result: Vec::with_capacity(DEFAULT_RESULT_BUFFER),
})
}
}
impl evm::Evm for WasmInterpreter {
fn exec(&mut self, params: ActionParams, ext: &mut ::ext::Ext) -> evm::Result<GasLeft> {
use parity_wasm::elements::Deserialize;
let code = params.code.expect("exec is only called on contract with code; qed");
trace!(target: "wasm", "Started wasm interpreter with code.len={:?}", code.len());
let env_instance = self.program.module("env")
// prefer explicit panic here
.expect("Wasm program to contain env module");
let env_memory = env_instance.memory(interpreter::ItemIndex::Internal(0))
// prefer explicit panic here
.expect("Linear memory to exist in wasm runtime");
if params.gas > ::std::u64::MAX.into() {
return Err(evm::Error::Wasm("Wasm interpreter cannot run contracts with gas >= 2^64".to_owned()));
}
let mut runtime = Runtime::with_params(
ext,
env_memory,
DEFAULT_STACK_SPACE,
params.gas.low_u64(),
);
let mut cursor = ::std::io::Cursor::new(&*code);
let contract_module = wasm_utils::inject_gas_counter(
elements::Module::deserialize(
&mut cursor
).map_err(|err| {
evm::Error::Wasm(format!("Error deserializing contract code ({:?})", err))
})?
);
let d_ptr = runtime.write_descriptor(
call_args::CallArgs::new(
params.address,
params.sender,
params.origin,
params.value.value(),
params.data.unwrap_or(Vec::with_capacity(0)),
)
)?;
{
let execution_params = interpreter::ExecutionParams::with_external(
"env".into(),
Arc::new(
interpreter::env_native_module(env_instance, native_bindings(&mut runtime))
.map_err(|err| {
// todo: prefer explicit panic here also?
evm::Error::Wasm(format!("Error instantiating native bindings: {:?}", err))
})?
)
).add_argument(interpreter::RuntimeValue::I32(d_ptr.as_raw() as i32));
let module_instance = self.program.add_module("contract", contract_module, Some(&execution_params.externals))
.map_err(|err| {
trace!(target: "wasm", "Error adding contract module: {:?}", err);
evm::Error::from(RuntimeError::Interpreter(err))
})?;
module_instance.execute_export("_call", execution_params)
.map_err(|err| {
trace!(target: "wasm", "Error executing contract: {:?}", err);
evm::Error::from(RuntimeError::Interpreter(err))
})?;
}
let result = result::WasmResult::new(d_ptr);
if result.peek_empty(&*runtime.memory())? {
trace!(target: "wasm", "Contract execution result is empty.");
Ok(GasLeft::Known(runtime.gas_left()?.into()))
} else {
self.result.clear();
// todo: use memory views to avoid copy
self.result.extend(result.pop(&*runtime.memory())?);
let len = self.result.len();
Ok(GasLeft::NeedsReturn {
gas_left: runtime.gas_left()?.into(),
data: ReturnData::new(
::std::mem::replace(&mut self.result, Vec::with_capacity(DEFAULT_RESULT_BUFFER)),
0,
len,
),
apply_state: true,
})
}
}
}
fn native_bindings<'a>(runtime: &'a mut Runtime) -> interpreter::UserFunctions<'a> {
interpreter::UserFunctions {
executor: runtime,
functions: ::std::borrow::Cow::from(env::SIGNATURES),
}
}

52
ethcore/evm/src/wasm/ptr.rs
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@@ -1,52 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Wasm bound-checked ptr
use parity_wasm::interpreter;
/// Bound-checked wrapper for webassembly memory
pub struct WasmPtr(u32);
/// Error in bound check
#[derive(Debug)]
pub enum Error {
AccessViolation,
}
impl From<u32> for WasmPtr {
fn from(raw: u32) -> Self {
WasmPtr(raw)
}
}
impl WasmPtr {
// todo: use memory view when they are on
/// Check memory range and return data with given length starting from the current pointer value
pub fn slice(&self, len: u32, mem: &interpreter::MemoryInstance) -> Result<Vec<u8>, Error> {
mem.get(self.0, len as usize).map_err(|_| Error::AccessViolation)
}
// todo: maybe 2gb limit can be enhanced
/// Convert i32 from wasm stack to the wrapped pointer
pub fn from_i32(raw_ptr: i32) -> Result<Self, Error> {
if raw_ptr < 0 { return Err(Error::AccessViolation); }
Ok(WasmPtr(raw_ptr as u32))
}
/// Return pointer raw value
pub fn as_raw(&self) -> u32 { self.0 }
}

51
ethcore/evm/src/wasm/result.rs
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@@ -1,51 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Wasm evm results helper
use byteorder::{LittleEndian, ByteOrder};
use parity_wasm::interpreter;
use super::ptr::WasmPtr;
use super::runtime::Error as RuntimeError;
/// Wrapper for wasm contract call result
pub struct WasmResult {
ptr: WasmPtr,
}
impl WasmResult {
/// New call result from given ptr
pub fn new(descriptor_ptr: WasmPtr) -> WasmResult {
WasmResult { ptr: descriptor_ptr }
}
/// Check if the result contains any data
pub fn peek_empty(&self, mem: &interpreter::MemoryInstance) -> Result<bool, RuntimeError> {
let result_len = LittleEndian::read_u32(&self.ptr.slice(16, mem)?[12..16]);
Ok(result_len == 0)
}
/// Consume the result ptr and return the actual data from wasm linear memory
pub fn pop(self, mem: &interpreter::MemoryInstance) -> Result<Vec<u8>, RuntimeError> {
let result_ptr = LittleEndian::read_u32(&self.ptr.slice(16, mem)?[8..12]);
let result_len = LittleEndian::read_u32(&self.ptr.slice(16, mem)?[12..16]);
trace!(target: "wasm", "contract result: {} bytes at @{}", result_len, result_ptr);
Ok(mem.get(result_ptr, result_len as usize)?)
}
}

356
ethcore/evm/src/wasm/runtime.rs
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@@ -1,356 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Wasm evm program runtime intstance
use std::sync::Arc;
use byteorder::{LittleEndian, ByteOrder};
use ext;
use parity_wasm::interpreter;
use util::{Address, H256, U256};
use super::ptr::{WasmPtr, Error as PtrError};
use super::call_args::CallArgs;
/// Wasm runtime error
#[derive(Debug)]
pub enum Error {
/// Storage error
Storage,
/// Allocator error
Allocator,
/// Invalid gas state during the call
InvalidGasState,
/// Memory access violation
AccessViolation,
/// Interpreter runtime error
Interpreter(interpreter::Error),
}
impl From<interpreter::Error> for Error {
fn from(err: interpreter::Error) -> Self {
Error::Interpreter(err)
}
}
impl From<PtrError> for Error {
fn from(err: PtrError) -> Self {
match err {
PtrError::AccessViolation => Error::AccessViolation,
}
}
}
/// Runtime enviroment data for wasm contract execution
pub struct Runtime<'a> {
gas_counter: u64,
gas_limit: u64,
dynamic_top: u32,
ext: &'a mut ext::Ext,
memory: Arc<interpreter::MemoryInstance>,
}
impl<'a> Runtime<'a> {
/// New runtime for wasm contract with specified params
pub fn with_params<'b>(
ext: &'b mut ext::Ext,
memory: Arc<interpreter::MemoryInstance>,
stack_space: u32,
gas_limit: u64,
) -> Runtime<'b> {
Runtime {
gas_counter: 0,
gas_limit: gas_limit,
dynamic_top: stack_space,
memory: memory,
ext: ext,
}
}
/// Write to the storage from wasm memory
pub fn storage_write(&mut self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
let mut context = context;
let val = self.pop_h256(&mut context)?;
let key = self.pop_h256(&mut context)?;
trace!(target: "wasm", "storage_write: value {} at @{}", &val, &key);
self.ext.set_storage(key, val)
.map_err(|_| interpreter::Error::Trap("Storage update error".to_owned()))?;
Ok(Some(0i32.into()))
}
/// Read from the storage to wasm memory
pub fn storage_read(&mut self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
let mut context = context;
let val_ptr = context.value_stack.pop_as::<i32>()?;
let key = self.pop_h256(&mut context)?;
let val = self.ext.storage_at(&key)
.map_err(|_| interpreter::Error::Trap("Storage read error".to_owned()))?;
self.memory.set(val_ptr as u32, &*val)?;
Ok(Some(0.into()))
}
/// Pass suicide to state runtime
pub fn suicide(&mut self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
let mut context = context;
let refund_address = self.pop_address(&mut context)?;
self.ext.suicide(&refund_address)
.map_err(|_| interpreter::Error::Trap("Suicide error".to_owned()))?;
Ok(None)
}
/// Invoke create in the state runtime
pub fn create(&mut self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
//
// method signature:
// fn create(endowment: *const u8, code_ptr: *const u8, code_len: u32, result_ptr: *mut u8) -> i32;
//
trace!(target: "wasm", "runtime: create contract");
let mut context = context;
let result_ptr = context.value_stack.pop_as::<i32>()? as u32;
trace!(target: "wasm", " result_ptr: {:?}", result_ptr);
let code_len = context.value_stack.pop_as::<i32>()? as u32;
trace!(target: "wasm", " code_len: {:?}", code_len);
let code_ptr = context.value_stack.pop_as::<i32>()? as u32;
trace!(target: "wasm", " code_ptr: {:?}", code_ptr);
let endowment = self.pop_u256(&mut context)?;
trace!(target: "wasm", " val: {:?}", endowment);
let code = self.memory.get(code_ptr, code_len as usize)?;
let gas_left = self.gas_left()
.map_err(|_| interpreter::Error::Trap("Gas state error".to_owned()))?
.into();
match self.ext.create(&gas_left, &endowment, &code, ext::CreateContractAddress::FromSenderAndCodeHash) {
ext::ContractCreateResult::Created(address, gas_left) => {
self.memory.set(result_ptr, &*address)?;
self.gas_counter = self.gas_limit - gas_left.low_u64();
trace!(target: "wasm", "runtime: create contract success (@{:?})", address);
Ok(Some(0i32.into()))
},
ext::ContractCreateResult::Failed => {
trace!(target: "wasm", "runtime: create contract fail");
Ok(Some((-1i32).into()))
}
}
}
/// Allocate memory using the wasm stack params
pub fn malloc(&mut self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
let amount = context.value_stack.pop_as::<i32>()? as u32;
let previous_top = self.dynamic_top;
self.dynamic_top = previous_top + amount;
Ok(Some((previous_top as i32).into()))
}
/// Allocate memory in wasm memory instance
pub fn alloc(&mut self, amount: u32) -> Result<u32, Error> {
let previous_top = self.dynamic_top;
self.dynamic_top = previous_top + amount;
Ok(previous_top.into())
}
/// Report gas cost with the params passed in wasm stack
fn gas(&mut self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
let amount = context.value_stack.pop_as::<i32>()? as u64;
if self.charge_gas(amount) {
Ok(None)
} else {
Err(interpreter::Error::Trap(format!("Gas exceeds limits of {}", self.gas_limit)))
}
}
fn charge_gas(&mut self, amount: u64) -> bool {
let prev = self.gas_counter;
if prev + amount > self.gas_limit {
// exceeds gas
false
} else {
self.gas_counter = prev + amount;
true
}
}
fn h256_at(&self, ptr: WasmPtr) -> Result<H256, interpreter::Error> {
Ok(H256::from_slice(&ptr.slice(32, &*self.memory)
.map_err(|_| interpreter::Error::Trap("Memory access violation".to_owned()))?
))
}
fn pop_h256(&self, context: &mut interpreter::CallerContext) -> Result<H256, interpreter::Error> {
let ptr = WasmPtr::from_i32(context.value_stack.pop_as::<i32>()?)
.map_err(|_| interpreter::Error::Trap("Memory access violation".to_owned()))?;
self.h256_at(ptr)
}
fn pop_u256(&self, context: &mut interpreter::CallerContext) -> Result<U256, interpreter::Error> {
let ptr = WasmPtr::from_i32(context.value_stack.pop_as::<i32>()?)
.map_err(|_| interpreter::Error::Trap("Memory access violation".to_owned()))?;
self.h256_at(ptr).map(Into::into)
}
fn address_at(&self, ptr: WasmPtr) -> Result<Address, interpreter::Error> {
Ok(Address::from_slice(&ptr.slice(20, &*self.memory)
.map_err(|_| interpreter::Error::Trap("Memory access violation".to_owned()))?
))
}
fn pop_address(&self, context: &mut interpreter::CallerContext) -> Result<Address, interpreter::Error> {
let ptr = WasmPtr::from_i32(context.value_stack.pop_as::<i32>()?)
.map_err(|_| interpreter::Error::Trap("Memory access violation".to_owned()))?;
self.address_at(ptr)
}
fn user_trap(&mut self, _context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
Err(interpreter::Error::Trap("unknown trap".to_owned()))
}
fn user_noop(&mut self,
_context: interpreter::CallerContext
) -> Result<Option<interpreter::RuntimeValue>, interpreter::Error> {
Ok(None)
}
/// Write call descriptor to wasm memory
pub fn write_descriptor(&mut self, call_args: CallArgs) -> Result<WasmPtr, Error> {
let d_ptr = self.alloc(16)?;
let args_len = call_args.len();
let args_ptr = self.alloc(args_len)?;
// write call descriptor
// call descriptor is [args_ptr, args_len, return_ptr, return_len]
// all are 4 byte length, last 2 are zeroed
let mut d_buf = [0u8; 16];
LittleEndian::write_u32(&mut d_buf[0..4], args_ptr);
LittleEndian::write_u32(&mut d_buf[4..8], args_len);
self.memory.set(d_ptr, &d_buf)?;
// write call args to memory
self.memory.set(args_ptr, &call_args.address)?;
self.memory.set(args_ptr+20, &call_args.sender)?;
self.memory.set(args_ptr+40, &call_args.origin)?;
self.memory.set(args_ptr+60, &call_args.value)?;
self.memory.set(args_ptr+92, &call_args.data)?;
Ok(d_ptr.into())
}
fn debug_log(&mut self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
let msg_len = context.value_stack.pop_as::<i32>()? as u32;
let msg_ptr = context.value_stack.pop_as::<i32>()? as u32;
let msg = String::from_utf8(self.memory.get(msg_ptr, msg_len as usize)?)
.map_err(|_| interpreter::Error::Trap("Debug log utf-8 decoding error".to_owned()))?;
trace!(target: "wasm", "Contract debug message: {}", msg);
Ok(None)
}
/// Query current gas left for execution
pub fn gas_left(&self) -> Result<u64, Error> {
if self.gas_counter > self.gas_limit { return Err(Error::InvalidGasState); }
Ok(self.gas_limit - self.gas_counter)
}
/// Shared memory reference
pub fn memory(&self) -> &interpreter::MemoryInstance {
&*self.memory
}
fn mem_copy(&self, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
let len = context.value_stack.pop_as::<i32>()? as u32;
let dst = context.value_stack.pop_as::<i32>()? as u32;
let src = context.value_stack.pop_as::<i32>()? as u32;
let mem = self.memory().get(src, len as usize)?;
self.memory().set(dst, &mem)?;
Ok(Some(0i32.into()))
}
}
impl<'a> interpreter::UserFunctionExecutor for Runtime<'a> {
fn execute(&mut self, name: &str, context: interpreter::CallerContext)
-> Result<Option<interpreter::RuntimeValue>, interpreter::Error>
{
match name {
"_malloc" => {
self.malloc(context)
},
"_free" => {
// Since it is arena allocator, free does nothing
// todo: update if changed
self.user_noop(context)
},
"_storage_read" => {
self.storage_read(context)
},
"_storage_write" => {
self.storage_write(context)
},
"_suicide" => {
self.suicide(context)
},
"_create" => {
self.create(context)
},
"_debug" => {
self.debug_log(context)
},
"gas" => {
self.gas(context)
},
"_emscripten_memcpy_big" => {
self.mem_copy(context)
},
_ => {
trace!("Unknown env func: '{}'", name);
self.user_trap(context)
}
}
}
}

298
ethcore/evm/src/wasm/tests.rs
View File

@@ -1,298 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use std::sync::Arc;
use super::super::tests::{FakeExt, FakeCall, FakeCallType};
use super::WasmInterpreter;
use evm::{self, Evm, GasLeft};
use action_params::{ActionParams, ActionValue};
use util::{U256, H256, Address};
macro_rules! load_sample {
($name: expr) => {
include_bytes!(concat!("../../../res/wasm-tests/compiled/", $name)).to_vec()
}
}
fn test_finalize(res: Result<GasLeft, evm::Error>) -> Result<U256, evm::Error> {
match res {
Ok(GasLeft::Known(gas)) => Ok(gas),
Ok(GasLeft::NeedsReturn{..}) => unimplemented!(), // since ret is unimplemented.
Err(e) => Err(e),
}
}
fn wasm_interpreter() -> WasmInterpreter {
WasmInterpreter::new().expect("wasm interpreter to create without errors")
}
/// Empty contract does almost nothing except producing 1 (one) local node debug log message
#[test]
fn empty() {
let code = load_sample!("empty.wasm");
let address: Address = "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6".parse().unwrap();
let mut params = ActionParams::default();
params.address = address.clone();
params.gas = U256::from(100_000);
params.code = Some(Arc::new(code));
let mut ext = FakeExt::new();
let gas_left = {
let mut interpreter = wasm_interpreter();
test_finalize(interpreter.exec(params, &mut ext)).unwrap()
};
assert_eq!(gas_left, U256::from(99_996));
}
// This test checks if the contract deserializes payload header properly.
// Contract is provided with receiver(address), sender, origin and transaction value
// logger.wasm writes all these provided fixed header fields to some arbitrary storage keys.
#[test]
fn logger() {
let code = load_sample!("logger.wasm");
let address: Address = "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6".parse().unwrap();
let sender: Address = "0d0d0d0d0d0d0d0d0d0d0d0d0d0d0d0d0d0d0d0d".parse().unwrap();
let origin: Address = "0102030405060708090a0b0c0d0e0f1011121314".parse().unwrap();
let mut params = ActionParams::default();
params.address = address.clone();
params.sender = sender.clone();
params.origin = origin.clone();
params.gas = U256::from(100_000);
params.value = ActionValue::transfer(1_000_000_000);
params.code = Some(Arc::new(code));
let mut ext = FakeExt::new();
let gas_left = {
let mut interpreter = wasm_interpreter();
test_finalize(interpreter.exec(params, &mut ext)).unwrap()
};
println!("ext.store: {:?}", ext.store);
assert_eq!(gas_left, U256::from(99581));
let address_val: H256 = address.into();
assert_eq!(
ext.store.get(&"0100000000000000000000000000000000000000000000000000000000000000".parse().unwrap()).expect("storage key to exist"),
&address_val,
"Logger sets 0x01 key to the provided address"
);
let sender_val: H256 = sender.into();
assert_eq!(
ext.store.get(&"0200000000000000000000000000000000000000000000000000000000000000".parse().unwrap()).expect("storage key to exist"),
&sender_val,
"Logger sets 0x02 key to the provided sender"
);
let origin_val: H256 = origin.into();
assert_eq!(
ext.store.get(&"0300000000000000000000000000000000000000000000000000000000000000".parse().unwrap()).expect("storage key to exist"),
&origin_val,
"Logger sets 0x03 key to the provided origin"
);
assert_eq!(
U256::from(ext.store.get(&"0400000000000000000000000000000000000000000000000000000000000000".parse().unwrap()).expect("storage key to exist")),
U256::from(1_000_000_000),
"Logger sets 0x04 key to the trasferred value"
);
}
// This test checks if the contract can allocate memory and pass pointer to the result stream properly.
// 1. Contract is being provided with the call descriptor ptr
// 2. Descriptor ptr is 16 byte length
// 3. The last 8 bytes of call descriptor is the space for the contract to fill [result_ptr[4], result_len[4]]
// if it has any result.
#[test]
fn identity() {
let code = load_sample!("identity.wasm");
let sender: Address = "01030507090b0d0f11131517191b1d1f21232527".parse().unwrap();
let mut params = ActionParams::default();
params.sender = sender.clone();
params.gas = U256::from(100_000);
params.code = Some(Arc::new(code));
let mut ext = FakeExt::new();
let (gas_left, result) = {
let mut interpreter = wasm_interpreter();
let result = interpreter.exec(params, &mut ext).expect("Interpreter to execute without any errors");
match result {
GasLeft::Known(_) => { panic!("Identity contract should return payload"); },
GasLeft::NeedsReturn { gas_left: gas, data: result, apply_state: _apply } => (gas, result.to_vec()),
}
};
assert_eq!(gas_left, U256::from(99_689));
assert_eq!(
Address::from_slice(&result),
sender,
"Idenity test contract does not return the sender passed"
);
}
// Dispersion test sends byte array and expect the contract to 'disperse' the original elements with
// their modulo 19 dopant.
// The result is always twice as long as the input.
// This also tests byte-perfect memory allocation and in/out ptr lifecycle.
#[test]
fn dispersion() {
let code = load_sample!("dispersion.wasm");
let mut params = ActionParams::default();
params.gas = U256::from(100_000);
params.code = Some(Arc::new(code));
params.data = Some(vec![
0u8, 125, 197, 255, 19
]);
let mut ext = FakeExt::new();
let (gas_left, result) = {
let mut interpreter = wasm_interpreter();
let result = interpreter.exec(params, &mut ext).expect("Interpreter to execute without any errors");
match result {
GasLeft::Known(_) => { panic!("Dispersion routine should return payload"); },
GasLeft::NeedsReturn { gas_left: gas, data: result, apply_state: _apply } => (gas, result.to_vec()),
}
};
assert_eq!(gas_left, U256::from(99_402));
assert_eq!(
result,
vec![0u8, 0, 125, 11, 197, 7, 255, 8, 19, 0]
);
}
#[test]
fn suicide_not() {
let code = load_sample!("suicidal.wasm");
let mut params = ActionParams::default();
params.gas = U256::from(100_000);
params.code = Some(Arc::new(code));
params.data = Some(vec![
0u8
]);
let mut ext = FakeExt::new();
let (gas_left, result) = {
let mut interpreter = wasm_interpreter();
let result = interpreter.exec(params, &mut ext).expect("Interpreter to execute without any errors");
match result {
GasLeft::Known(_) => { panic!("Suicidal contract should return payload when had not actualy killed himself"); },
GasLeft::NeedsReturn { gas_left: gas, data: result, apply_state: _apply } => (gas, result.to_vec()),
}
};
assert_eq!(gas_left, U256::from(99_703));
assert_eq!(
result,
vec![0u8]
);
}
#[test]
fn suicide() {
let code = load_sample!("suicidal.wasm");
let refund: Address = "01030507090b0d0f11131517191b1d1f21232527".parse().unwrap();
let mut params = ActionParams::default();
params.gas = U256::from(100_000);
params.code = Some(Arc::new(code));
let mut args = vec![127u8];
args.extend(refund.to_vec());
params.data = Some(args);
let mut ext = FakeExt::new();
let gas_left = {
let mut interpreter = wasm_interpreter();
let result = interpreter.exec(params, &mut ext).expect("Interpreter to execute without any errors");
match result {
GasLeft::Known(gas) => gas,
GasLeft::NeedsReturn { .. } => {
panic!("Suicidal contract should not return anything when had killed itself");
},
}
};
assert_eq!(gas_left, U256::from(99_747));
assert!(ext.suicides.contains(&refund));
}
#[test]
fn create() {
let mut params = ActionParams::default();
params.gas = U256::from(100_000);
params.code = Some(Arc::new(load_sample!("creator.wasm")));
params.data = Some(vec![0u8, 2, 4, 8, 16, 32, 64, 128]);
params.value = ActionValue::transfer(1_000_000_000);
let mut ext = FakeExt::new();
let gas_left = {
let mut interpreter = wasm_interpreter();
let result = interpreter.exec(params, &mut ext).expect("Interpreter to execute without any errors");
match result {
GasLeft::Known(gas) => gas,
GasLeft::NeedsReturn { .. } => {
panic!("Create contract should not return anthing because ext always fails on creation");
},
}
};
trace!(target: "wasm", "fake_calls: {:?}", &ext.calls);
assert!(ext.calls.contains(
&FakeCall {
call_type: FakeCallType::Create,
gas: U256::from(99_778),
sender_address: None,
receive_address: None,
value: Some(1_000_000_000.into()),
data: vec![0u8, 2, 4, 8, 16, 32, 64, 128],
code_address: None,
}
));
assert_eq!(gas_left, U256::from(99_768));
}
// Realloc test
#[test]
fn realloc() {
let code = load_sample!("realloc.wasm");
let mut params = ActionParams::default();
params.gas = U256::from(100_000);
params.code = Some(Arc::new(code));
params.data = Some(vec![0u8]);
let mut ext = FakeExt::new();
let (gas_left, result) = {
let mut interpreter = wasm_interpreter();
let result = interpreter.exec(params, &mut ext).expect("Interpreter to execute without any errors");
match result {
GasLeft::Known(_) => { panic!("Realloc should return payload"); },
GasLeft::NeedsReturn { gas_left: gas, data: result, apply_state: _apply } => (gas, result.to_vec()),
}
};
assert_eq!(gas_left, U256::from(98326));
assert_eq!(result, vec![0u8; 2]);
}