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use std::collections::HashMap; use parity_wasm::elements; pub struct UnknownInstruction; #[derive(Debug, PartialEq, Eq, Copy, Clone)] pub enum Metering { Regular, Forbidden, Fixed(u32), } #[derive(Debug, Hash, PartialEq, Eq, Copy, Clone)] pub enum InstructionType { Bit, Add, Mul, Div, Load, Store, Const, FloatConst, Local, Global, ControlFlow, IntegerComparsion, FloatComparsion, Float, Conversion, FloatConversion, Reinterpretation, Unreachable, Nop, CurrentMemory, GrowMemory, } impl ::std::str::FromStr for InstructionType { type Err = UnknownInstruction; fn from_str(s: &str) -> Result<Self, Self::Err> { match s { "bit" => Ok(InstructionType::Bit), "add" => Ok(InstructionType::Add), "mul" => Ok(InstructionType::Mul), "div" => Ok(InstructionType::Div), "load" => Ok(InstructionType::Load), "store" => Ok(InstructionType::Store), "const" => Ok(InstructionType::Const), "local" => Ok(InstructionType::Local), "global" => Ok(InstructionType::Global), "flow" => Ok(InstructionType::ControlFlow), "integer_comp" => Ok(InstructionType::IntegerComparsion), "float_comp" => Ok(InstructionType::FloatComparsion), "float" => Ok(InstructionType::Float), "conversion" => Ok(InstructionType::Conversion), "float_conversion" => Ok(InstructionType::FloatConversion), "reinterpret" => Ok(InstructionType::Reinterpretation), "unreachable" => Ok(InstructionType::Unreachable), "nop" => Ok(InstructionType::Nop), "currrent_mem" => Ok(InstructionType::CurrentMemory), "grow_mem" => Ok(InstructionType::GrowMemory), _ => Err(UnknownInstruction), } } } impl InstructionType { pub fn op(opcode: &elements::Opcode) -> Self { use parity_wasm::elements::Opcode::*; match *opcode { Unreachable => InstructionType::Unreachable, Nop => InstructionType::Nop, Block(_) => InstructionType::ControlFlow, Loop(_) => InstructionType::ControlFlow, If(_) => InstructionType::ControlFlow, Else => InstructionType::ControlFlow, End => InstructionType::ControlFlow, Br(_) => InstructionType::ControlFlow, BrIf(_) => InstructionType::ControlFlow, BrTable(_, _) => InstructionType::ControlFlow, Return => InstructionType::ControlFlow, Call(_) => InstructionType::ControlFlow, CallIndirect(_, _) => InstructionType::ControlFlow, Drop => InstructionType::ControlFlow, Select => InstructionType::ControlFlow, GetLocal(_) => InstructionType::Local, SetLocal(_) => InstructionType::Local, TeeLocal(_) => InstructionType::Local, GetGlobal(_) => InstructionType::Local, SetGlobal(_) => InstructionType::Local, I32Load(_, _) => InstructionType::Load, I64Load(_, _) => InstructionType::Load, F32Load(_, _) => InstructionType::Load, F64Load(_, _) => InstructionType::Load, I32Load8S(_, _) => InstructionType::Load, I32Load8U(_, _) => InstructionType::Load, I32Load16S(_, _) => InstructionType::Load, I32Load16U(_, _) => InstructionType::Load, I64Load8S(_, _) => InstructionType::Load, I64Load8U(_, _) => InstructionType::Load, I64Load16S(_, _) => InstructionType::Load, I64Load16U(_, _) => InstructionType::Load, I64Load32S(_, _) => InstructionType::Load, I64Load32U(_, _) => InstructionType::Load, I32Store(_, _) => InstructionType::Store, I64Store(_, _) => InstructionType::Store, F32Store(_, _) => InstructionType::Store, F64Store(_, _) => InstructionType::Store, I32Store8(_, _) => InstructionType::Store, I32Store16(_, _) => InstructionType::Store, I64Store8(_, _) => InstructionType::Store, I64Store16(_, _) => InstructionType::Store, I64Store32(_, _) => InstructionType::Store, CurrentMemory(_) => InstructionType::CurrentMemory, GrowMemory(_) => InstructionType::GrowMemory, I32Const(_) => InstructionType::Const, I64Const(_) => InstructionType::Const, F32Const(_) => InstructionType::FloatConst, F64Const(_) => InstructionType::FloatConst, I32Eqz => InstructionType::IntegerComparsion, I32Eq => InstructionType::IntegerComparsion, I32Ne => InstructionType::IntegerComparsion, I32LtS => InstructionType::IntegerComparsion, I32LtU => InstructionType::IntegerComparsion, I32GtS => InstructionType::IntegerComparsion, I32GtU => InstructionType::IntegerComparsion, I32LeS => InstructionType::IntegerComparsion, I32LeU => InstructionType::IntegerComparsion, I32GeS => InstructionType::IntegerComparsion, I32GeU => InstructionType::IntegerComparsion, I64Eqz => InstructionType::IntegerComparsion, I64Eq => InstructionType::IntegerComparsion, I64Ne => InstructionType::IntegerComparsion, I64LtS => InstructionType::IntegerComparsion, I64LtU => InstructionType::IntegerComparsion, I64GtS => InstructionType::IntegerComparsion, I64GtU => InstructionType::IntegerComparsion, I64LeS => InstructionType::IntegerComparsion, I64LeU => InstructionType::IntegerComparsion, I64GeS => InstructionType::IntegerComparsion, I64GeU => InstructionType::IntegerComparsion, F32Eq => InstructionType::FloatComparsion, F32Ne => InstructionType::FloatComparsion, F32Lt => InstructionType::FloatComparsion, F32Gt => InstructionType::FloatComparsion, F32Le => InstructionType::FloatComparsion, F32Ge => InstructionType::FloatComparsion, F64Eq => InstructionType::FloatComparsion, F64Ne => InstructionType::FloatComparsion, F64Lt => InstructionType::FloatComparsion, F64Gt => InstructionType::FloatComparsion, F64Le => InstructionType::FloatComparsion, F64Ge => InstructionType::FloatComparsion, I32Clz => InstructionType::Bit, I32Ctz => InstructionType::Bit, I32Popcnt => InstructionType::Bit, I32Add => InstructionType::Add, I32Sub => InstructionType::Add, I32Mul => InstructionType::Mul, I32DivS => InstructionType::Div, I32DivU => InstructionType::Div, I32RemS => InstructionType::Div, I32RemU => InstructionType::Div, I32And => InstructionType::Bit, I32Or => InstructionType::Bit, I32Xor => InstructionType::Bit, I32Shl => InstructionType::Bit, I32ShrS => InstructionType::Bit, I32ShrU => InstructionType::Bit, I32Rotl => InstructionType::Bit, I32Rotr => InstructionType::Bit, I64Clz => InstructionType::Bit, I64Ctz => InstructionType::Bit, I64Popcnt => InstructionType::Bit, I64Add => InstructionType::Add, I64Sub => InstructionType::Add, I64Mul => InstructionType::Mul, I64DivS => InstructionType::Div, I64DivU => InstructionType::Div, I64RemS => InstructionType::Div, I64RemU => InstructionType::Div, I64And => InstructionType::Bit, I64Or => InstructionType::Bit, I64Xor => InstructionType::Bit, I64Shl => InstructionType::Bit, I64ShrS => InstructionType::Bit, I64ShrU => InstructionType::Bit, I64Rotl => InstructionType::Bit, I64Rotr => InstructionType::Bit, F32Abs => InstructionType::Float, F32Neg => InstructionType::Float, F32Ceil => InstructionType::Float, F32Floor => InstructionType::Float, F32Trunc => InstructionType::Float, F32Nearest => InstructionType::Float, F32Sqrt => InstructionType::Float, F32Add => InstructionType::Float, F32Sub => InstructionType::Float, F32Mul => InstructionType::Float, F32Div => InstructionType::Float, F32Min => InstructionType::Float, F32Max => InstructionType::Float, F32Copysign => InstructionType::Float, F64Abs => InstructionType::Float, F64Neg => InstructionType::Float, F64Ceil => InstructionType::Float, F64Floor => InstructionType::Float, F64Trunc => InstructionType::Float, F64Nearest => InstructionType::Float, F64Sqrt => InstructionType::Float, F64Add => InstructionType::Float, F64Sub => InstructionType::Float, F64Mul => InstructionType::Float, F64Div => InstructionType::Float, F64Min => InstructionType::Float, F64Max => InstructionType::Float, F64Copysign => InstructionType::Float, I32WrapI64 => InstructionType::Conversion, I64ExtendSI32 => InstructionType::Conversion, I64ExtendUI32 => InstructionType::Conversion, I32TruncSF32 => InstructionType::FloatConversion, I32TruncUF32 => InstructionType::FloatConversion, I32TruncSF64 => InstructionType::FloatConversion, I32TruncUF64 => InstructionType::FloatConversion, I64TruncSF32 => InstructionType::FloatConversion, I64TruncUF32 => InstructionType::FloatConversion, I64TruncSF64 => InstructionType::FloatConversion, I64TruncUF64 => InstructionType::FloatConversion, F32ConvertSI32 => InstructionType::FloatConversion, F32ConvertUI32 => InstructionType::FloatConversion, F32ConvertSI64 => InstructionType::FloatConversion, F32ConvertUI64 => InstructionType::FloatConversion, F32DemoteF64 => InstructionType::FloatConversion, F64ConvertSI32 => InstructionType::FloatConversion, F64ConvertUI32 => InstructionType::FloatConversion, F64ConvertSI64 => InstructionType::FloatConversion, F64ConvertUI64 => InstructionType::FloatConversion, F64PromoteF32 => InstructionType::FloatConversion, I32ReinterpretF32 => InstructionType::Reinterpretation, I64ReinterpretF64 => InstructionType::Reinterpretation, F32ReinterpretI32 => InstructionType::Reinterpretation, F64ReinterpretI64 => InstructionType::Reinterpretation, } } } #[derive(Debug)] pub struct Set { regular: u32, entries: HashMap<InstructionType, Metering>, grow: u32, } impl Default for Set { fn default() -> Self { Set { regular: 1, entries: HashMap::new(), grow: 0, } } } impl Set { pub fn new(regular: u32, entries: HashMap<InstructionType, Metering>) -> Self { Set { regular: regular, entries: entries, grow: 0 } } pub fn process(&self, opcode: &elements::Opcode) -> Result<u32, ()> { match self.entries.get(&InstructionType::op(opcode)).map(|x| *x) { None | Some(Metering::Regular) => Ok(self.regular), Some(Metering::Forbidden) => Err(()), Some(Metering::Fixed(val)) => Ok(val), } } pub fn grow_cost(&self) -> u32 { self.grow } pub fn with_grow_cost(mut self, val: u32) -> Self { self.grow = val; self } pub fn with_forbidden_floats(mut self) -> Self { self.entries.insert(InstructionType::Float, Metering::Forbidden); self.entries.insert(InstructionType::FloatComparsion, Metering::Forbidden); self.entries.insert(InstructionType::FloatConst, Metering::Forbidden); self.entries.insert(InstructionType::FloatConversion, Metering::Forbidden); self } }