346 lines
10 KiB
Rust
346 lines
10 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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use ethereum_types::{H160, H256, U256};
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use fixture::{Assert, CallLocator, Fixture, Source};
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use rustc_hex::ToHex;
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use std::{
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fmt, fs,
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io::{self, Read},
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path,
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sync::Arc,
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};
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use vm::{self, tests::FakeExt, ActionParams, ActionValue, Exec, GasLeft, ParamsType};
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use wasm::WasmInterpreter;
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fn load_code<P: AsRef<path::Path>>(p: P) -> io::Result<Vec<u8>> {
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let mut result = Vec::new();
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let mut f = fs::File::open(p)?;
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f.read_to_end(&mut result)?;
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Ok(result)
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}
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fn wasm_interpreter(params: ActionParams) -> Box<WasmInterpreter> {
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Box::new(WasmInterpreter::new(params))
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}
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#[derive(Debug)]
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pub enum SpecNonconformity {
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Address,
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}
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#[derive(Debug)]
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pub enum Fail {
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Return {
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expected: Vec<u8>,
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actual: Vec<u8>,
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},
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UsedGas {
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expected: u64,
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actual: u64,
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},
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Runtime(String),
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Load(io::Error),
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NoCall(CallLocator),
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StorageMismatch {
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key: H256,
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expected: H256,
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actual: Option<H256>,
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},
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Nonconformity(SpecNonconformity),
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}
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impl Fail {
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fn runtime(err: vm::Error) -> Vec<Fail> {
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vec![Fail::Runtime(format!("{}", err))]
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}
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fn load(err: io::Error) -> Vec<Fail> {
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vec![Fail::Load(err)]
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}
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fn nononformity(kind: SpecNonconformity) -> Vec<Fail> {
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vec![Fail::Nonconformity(kind)]
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}
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}
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impl fmt::Display for Fail {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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use self::Fail::*;
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match *self {
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Return {
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ref expected,
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ref actual,
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} => write!(
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f,
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"Expected to return result: 0x{} ({} bytes), but got 0x{} ({} bytes)",
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expected.to_hex(),
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expected.len(),
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actual.to_hex(),
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actual.len()
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),
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UsedGas { expected, actual } => write!(
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f,
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"Expected to use gas: {}, but got actual gas used: {}",
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expected, actual
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),
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Runtime(ref s) => write!(f, "WASM Runtime error: {}", s),
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Load(ref e) => write!(f, "Load i/o error: {}", e),
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NoCall(ref call) => write!(f, "Call not found: {:?}", call),
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StorageMismatch {
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ref key,
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ref expected,
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actual: Some(ref actual),
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} => write!(
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f,
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"Storage key {} value mismatch, expected {}, got: {}",
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key.to_vec().to_hex(),
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expected.to_vec().to_hex(),
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actual.to_vec().to_hex(),
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),
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StorageMismatch {
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ref key,
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ref expected,
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actual: None,
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} => write!(
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f,
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"No expected storage value for key {} found, expected {}",
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key.to_vec().to_hex(),
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expected.to_vec().to_hex(),
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),
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Nonconformity(SpecNonconformity::Address) => {
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write!(f, "Cannot use address when constructor is specified!")
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}
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}
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}
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}
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pub fn construct(
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ext: &mut dyn vm::Ext,
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source: Vec<u8>,
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arguments: Vec<u8>,
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sender: H160,
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at: H160,
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) -> Result<Vec<u8>, vm::Error> {
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let mut params = ActionParams::default();
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params.sender = sender;
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params.address = at;
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params.gas = U256::from(100_000_000);
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params.data = Some(arguments);
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params.code = Some(Arc::new(source));
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params.params_type = ParamsType::Separate;
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Ok(
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match wasm_interpreter(params)
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.exec(ext)
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.ok()
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.expect("Wasm interpreter always calls with trap=false; trap never happens; qed")?
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{
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GasLeft::Known(_) => Vec::new(),
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GasLeft::NeedsReturn { data, .. } => data.to_vec(),
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},
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)
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}
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pub fn run_fixture(fixture: &Fixture) -> Vec<Fail> {
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let mut params = ActionParams::default();
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let source = match load_code(fixture.source.as_ref()) {
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Ok(code) => code,
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Err(e) => {
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return Fail::load(e);
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}
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};
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let mut ext = FakeExt::new().with_wasm();
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params.code = Some(Arc::new(
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if let Source::Constructor {
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ref arguments,
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ref sender,
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ref at,
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..
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} = fixture.source
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{
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match construct(
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&mut ext,
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source,
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arguments.clone().into(),
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sender.clone().into(),
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at.clone().into(),
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) {
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Ok(code) => code,
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Err(e) => {
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return Fail::runtime(e);
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}
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}
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} else {
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source
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},
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));
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if let Some(ref sender) = fixture.sender {
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params.sender = sender.clone().into();
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}
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if let Some(ref address) = fixture.address {
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if let Source::Constructor { .. } = fixture.source {
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return Fail::nononformity(SpecNonconformity::Address);
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}
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params.address = address.clone().into();
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} else if let Source::Constructor { ref at, .. } = fixture.source {
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params.address = at.clone().into();
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}
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if let Some(gas_limit) = fixture.gas_limit {
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params.gas = U256::from(gas_limit);
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}
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if let Some(ref data) = fixture.payload {
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params.data = Some(data.clone().into())
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}
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if let Some(value) = fixture.value {
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params.value = ActionValue::Transfer(value.clone().into())
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}
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if let Some(ref storage) = fixture.storage {
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for storage_entry in storage.iter() {
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let key: U256 = storage_entry.key.into();
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let val: U256 = storage_entry.value.into();
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ext.store.insert(key.into(), val.into());
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}
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}
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let interpreter = wasm_interpreter(params);
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let interpreter_return = match interpreter
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.exec(&mut ext)
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.ok()
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.expect("Wasm interpreter always calls with trap=false; trap never happens; qed")
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{
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Ok(ret) => ret,
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Err(e) => {
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return Fail::runtime(e);
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}
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};
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let (gas_left, result) = match interpreter_return {
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GasLeft::Known(gas) => (gas, Vec::new()),
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GasLeft::NeedsReturn {
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gas_left: gas,
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data: result,
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apply_state: _apply,
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} => (gas, result.to_vec()),
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};
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let mut fails = Vec::new();
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for assert in fixture.asserts.iter() {
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match *assert {
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Assert::Return(ref data) => {
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if &data[..] != &result[..] {
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fails.push(Fail::Return {
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expected: (&data[..]).to_vec(),
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actual: (&result[..]).to_vec(),
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})
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}
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}
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Assert::UsedGas(gas) => {
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let used_gas = fixture.gas_limit.unwrap_or(0) - gas_left.low_u64();
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if gas != used_gas {
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fails.push(Fail::UsedGas {
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expected: gas,
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actual: used_gas,
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});
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}
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}
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Assert::HasCall(ref locator) => {
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let mut found = false;
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for fake_call in ext.calls.iter() {
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let mut match_ = true;
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if let Some(ref data) = locator.data {
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if data.as_ref() != &fake_call.data[..] {
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match_ = false;
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}
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}
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if let Some(ref code_addr) = locator.code_address {
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if fake_call.code_address.unwrap_or(H160::zero())
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!= code_addr.clone().into()
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{
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match_ = false
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}
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}
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if let Some(ref sender) = locator.sender {
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if fake_call.sender_address.unwrap_or(H160::zero()) != sender.clone().into()
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{
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match_ = false
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}
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}
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if let Some(ref receiver) = locator.receiver {
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if fake_call.receive_address.unwrap_or(H160::zero())
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!= receiver.clone().into()
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{
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match_ = false
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}
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}
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if match_ {
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found = true;
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break;
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}
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}
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if !found {
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fails.push(Fail::NoCall(locator.clone()))
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}
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}
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Assert::HasStorage(ref storage_entry) => {
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let expected_storage_key: H256 = storage_entry.key.clone().into();
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let expected_storage_value: H256 = storage_entry.value.clone().into();
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let val = ext.store.get(&expected_storage_key);
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if let Some(val) = val {
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if val != &expected_storage_value {
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fails.push(Fail::StorageMismatch {
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key: expected_storage_key,
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expected: expected_storage_value,
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actual: Some(val.clone()),
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})
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}
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} else {
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fails.push(Fail::StorageMismatch {
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key: expected_storage_key,
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expected: expected_storage_value,
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actual: None,
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})
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}
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}
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}
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}
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fails
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}
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