openethereum/ethcore/vm/src/error.rs
Arkadiy Paronyan 25b35ebddd Byzantium updates (#5855)
* EIP-211 updates

* benchmarks

* blockhash instruction gas cost updated

* More benches

* EIP-684

* EIP-649

* EIP-658

* Updated some tests

* Modexp fixes

* STATICCALL fixes

* Pairing fixes

* More STATICALL fixes

* Use paritytech/bn

* Fixed REVERTing of contract creation

* Fixed more tests

* Fixed more tests

* Blockchain tests

* Enable previously broken tests

* Transition test

* Updated tests

* Fixed modexp reading huge numbers

* Enabled max_code_size test

* Review fixes

* Updated pairing pricing

* missing commas (style)

* Update test.rs

* Small improvements

* eip161abc
2017-09-15 21:07:54 +02:00

107 lines
3.6 KiB
Rust

// 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/>.
//! VM errors module
use trie;
use std::fmt;
/// VM 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),
/// Out of bounds access in RETURNDATACOPY.
OutOfBounds,
/// Execution has been reverted with REVERT.
Reverted,
}
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),
OutOfBounds => write!(f, "Out of bounds"),
Reverted => write!(f, "Reverted"),
}
}
}
pub type Result<T> = ::std::result::Result<T, Error>;