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use crate::backend::ExceptionCode;
use crate::types::{FuncSig, GlobalDescriptor, MemoryDescriptor, TableDescriptor, Type};
use core::borrow::Borrow;
use std::any::Any;
pub type Result<T> = std::result::Result<T, Error>;
pub type CompileResult<T> = std::result::Result<T, CompileError>;
pub type LinkResult<T> = std::result::Result<T, Vec<LinkError>>;
pub type RuntimeResult<T> = std::result::Result<T, RuntimeError>;
pub type CallResult<T> = std::result::Result<T, CallError>;
pub type ResolveResult<T> = std::result::Result<T, ResolveError>;
pub type ParseResult<T> = std::result::Result<T, ParseError>;
#[derive(Debug, Clone)]
pub enum CompileError {
ValidationError {
msg: String,
},
InternalError {
msg: String,
},
}
impl PartialEq for CompileError {
fn eq(&self, _other: &CompileError) -> bool {
false
}
}
impl std::fmt::Display for CompileError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
CompileError::InternalError { msg } => {
write!(f, "Internal compiler error: \"{}\"", msg)
}
CompileError::ValidationError { msg } => write!(f, "Validation error \"{}\"", msg),
}
}
}
impl std::error::Error for CompileError {}
#[derive(Debug, Clone)]
pub enum LinkError {
IncorrectImportType {
namespace: String,
name: String,
expected: String,
found: String,
},
IncorrectImportSignature {
namespace: String,
name: String,
expected: FuncSig,
found: FuncSig,
},
ImportNotFound {
namespace: String,
name: String,
},
IncorrectMemoryDescriptor {
namespace: String,
name: String,
expected: MemoryDescriptor,
found: MemoryDescriptor,
},
IncorrectTableDescriptor {
namespace: String,
name: String,
expected: TableDescriptor,
found: TableDescriptor,
},
IncorrectGlobalDescriptor {
namespace: String,
name: String,
expected: GlobalDescriptor,
found: GlobalDescriptor,
},
Generic {
message: String,
},
}
impl PartialEq for LinkError {
fn eq(&self, _other: &LinkError) -> bool {
false
}
}
impl std::fmt::Display for LinkError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
LinkError::ImportNotFound {namespace, name} => write!(f, "Import not found, namespace: {}, name: {}", namespace, name),
LinkError::IncorrectGlobalDescriptor {namespace, name,expected,found} => {
write!(f, "Incorrect global descriptor, namespace: {}, name: {}, expected global descriptor: {:?}, found global descriptor: {:?}", namespace, name, expected, found)
},
LinkError::IncorrectImportSignature{namespace, name,expected,found} => {
write!(f, "Incorrect import signature, namespace: {}, name: {}, expected signature: {}, found signature: {}", namespace, name, expected, found)
}
LinkError::IncorrectImportType{namespace, name,expected,found} => {
write!(f, "Incorrect import type, namespace: {}, name: {}, expected type: {}, found type: {}", namespace, name, expected, found)
}
LinkError::IncorrectMemoryDescriptor{namespace, name,expected,found} => {
write!(f, "Incorrect memory descriptor, namespace: {}, name: {}, expected memory descriptor: {:?}, found memory descriptor: {:?}", namespace, name, expected, found)
},
LinkError::IncorrectTableDescriptor{namespace, name,expected,found} => {
write!(f, "Incorrect table descriptor, namespace: {}, name: {}, expected table descriptor: {:?}, found table descriptor: {:?}", namespace, name, expected, found)
},
LinkError::Generic { message } => {
write!(f, "{}", message)
},
}
}
}
impl std::error::Error for LinkError {}
#[derive(Debug)]
pub enum InvokeError {
FailedWithNoError,
UnknownTrap {
address: usize,
signal: &'static str,
},
TrapCode {
code: ExceptionCode,
srcloc: u32,
},
UnknownTrapCode {
trap_code: String,
srcloc: u32,
},
EarlyTrap(Box<RuntimeError>),
Breakpoint(Box<RuntimeError>),
}
impl From<InvokeError> for RuntimeError {
fn from(other: InvokeError) -> RuntimeError {
match other {
InvokeError::EarlyTrap(re) | InvokeError::Breakpoint(re) => *re,
_ => RuntimeError::InvokeError(other),
}
}
}
impl std::error::Error for InvokeError {}
impl std::fmt::Display for InvokeError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
InvokeError::FailedWithNoError => write!(f, "Invoke failed with no error"),
InvokeError::UnknownTrap { address, signal } => write!(
f,
"An unknown trap (`{}`) occured at 0x{:X}",
signal, address
),
InvokeError::TrapCode { code, srcloc } => {
write!(f, "A `{}` trap was thrown at code offset {}", code, srcloc)
}
InvokeError::UnknownTrapCode { trap_code, srcloc } => write!(
f,
"A trap with an unknown trap code (`{}`) was thrown at code offset {}",
trap_code, srcloc
),
InvokeError::EarlyTrap(rte) => write!(f, "Early trap: {}", rte),
InvokeError::Breakpoint(rte) => write!(f, "Breakpoint hit: {}", rte),
}
}
}
#[derive(Debug)]
pub enum RuntimeError {
InvokeError(InvokeError),
Metering(Box<dyn Any + Send>),
InstanceImage(Box<dyn Any + Send>),
User(Box<dyn Any + Send>),
}
impl PartialEq for RuntimeError {
fn eq(&self, _other: &RuntimeError) -> bool {
false
}
}
impl std::error::Error for RuntimeError {}
impl std::fmt::Display for RuntimeError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
RuntimeError::InvokeError(ie) => write!(f, "Error when calling invoke: {}", ie),
RuntimeError::Metering(_) => write!(f, "unknown metering error type"),
RuntimeError::InstanceImage(_) => write!(
f,
"Execution interrupted by a suspend signal: instance image returned"
),
RuntimeError::User(user_error) => {
write!(f, "User supplied error: ")?;
if let Some(s) = user_error.downcast_ref::<String>() {
write!(f, "\"{}\"", s)
} else if let Some(s) = user_error.downcast_ref::<&str>() {
write!(f, "\"{}\"", s)
} else if let Some(n) = user_error.downcast_ref::<i32>() {
write!(f, "{}", n)
} else {
write!(f, "unknown user error type")
}
}
}
}
}
#[derive(Debug, Clone)]
pub enum ResolveError {
Signature {
expected: FuncSig,
found: Vec<Type>,
},
ExportNotFound {
name: String,
},
ExportWrongType {
name: String,
},
}
impl PartialEq for ResolveError {
fn eq(&self, _other: &ResolveError) -> bool {
false
}
}
impl std::fmt::Display for ResolveError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
ResolveError::ExportNotFound { name } => write!(f, "Export not found: {}", name),
ResolveError::ExportWrongType { name } => write!(f, "Export wrong type: {}", name),
ResolveError::Signature { expected, found } => {
let found = found
.as_slice()
.iter()
.map(|p| p.to_string())
.collect::<Vec<_>>()
.join(", ");
let expected: &FuncSig = expected.borrow();
write!(
f,
"Parameters of type [{}] did not match signature {}",
found, expected
)
}
}
}
}
impl std::error::Error for ResolveError {}
pub enum CallError {
Resolve(ResolveError),
Runtime(RuntimeError),
}
impl PartialEq for CallError {
fn eq(&self, _other: &CallError) -> bool {
false
}
}
impl std::fmt::Display for CallError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
CallError::Resolve(resolve_error) => write!(f, "Call error: {}", resolve_error),
CallError::Runtime(runtime_error) => write!(f, "Call error: {}", runtime_error),
}
}
}
impl std::fmt::Debug for CallError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
CallError::Resolve(resolve_err) => write!(f, "ResolveError: {:?}", resolve_err),
CallError::Runtime(runtime_err) => write!(f, "RuntimeError: {:?}", runtime_err),
}
}
}
impl std::error::Error for CallError {}
#[derive(Debug, Clone)]
pub enum CreationError {
UnableToCreateMemory,
UnableToCreateTable,
InvalidDescriptor(String),
}
impl PartialEq for CreationError {
fn eq(&self, _other: &CreationError) -> bool {
false
}
}
impl std::fmt::Display for CreationError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
CreationError::UnableToCreateMemory => write!(f, "Unable to Create Memory"),
CreationError::UnableToCreateTable => write!(f, "Unable to Create Table"),
CreationError::InvalidDescriptor(msg) => write!(
f,
"Unable to create because the supplied descriptor is invalid: \"{}\"",
msg
),
}
}
}
impl std::error::Error for CreationError {}
#[derive(Debug)]
pub enum Error {
CompileError(CompileError),
LinkError(Vec<LinkError>),
RuntimeError(RuntimeError),
ResolveError(ResolveError),
CallError(CallError),
CreationError(CreationError),
}
impl PartialEq for Error {
fn eq(&self, _other: &Error) -> bool {
false
}
}
impl From<CompileError> for Error {
fn from(compile_err: CompileError) -> Self {
Error::CompileError(compile_err)
}
}
impl From<RuntimeError> for Error {
fn from(runtime_err: RuntimeError) -> Self {
Error::RuntimeError(runtime_err)
}
}
impl From<ResolveError> for Error {
fn from(resolve_err: ResolveError) -> Self {
Error::ResolveError(resolve_err)
}
}
impl From<CallError> for Error {
fn from(call_err: CallError) -> Self {
Error::CallError(call_err)
}
}
impl From<CreationError> for Error {
fn from(creation_err: CreationError) -> Self {
Error::CreationError(creation_err)
}
}
impl From<Vec<LinkError>> for Error {
fn from(link_errs: Vec<LinkError>) -> Self {
Error::LinkError(link_errs)
}
}
impl From<RuntimeError> for CallError {
fn from(runtime_err: RuntimeError) -> Self {
CallError::Runtime(runtime_err)
}
}
impl From<ResolveError> for CallError {
fn from(resolve_err: ResolveError) -> Self {
CallError::Resolve(resolve_err)
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
Error::CompileError(err) => write!(f, "compile error: {}", err),
Error::LinkError(errs) => {
if errs.len() == 1 {
write!(f, "link error: {}", errs[0])
} else {
write!(f, "{} link errors:", errs.len())?;
for (i, err) in errs.iter().enumerate() {
write!(f, " ({} of {}) {}", i + 1, errs.len(), err)?;
}
Ok(())
}
}
Error::RuntimeError(err) => write!(f, "runtime error: {}", err),
Error::ResolveError(err) => write!(f, "resolve error: {}", err),
Error::CallError(err) => write!(f, "call error: {}", err),
Error::CreationError(err) => write!(f, "creation error: {}", err),
}
}
}
impl std::error::Error for Error {}
#[derive(Debug)]
pub enum GrowError {
MemoryGrowError,
TableGrowError,
ExceededMaxPages(PageError),
ExceededMaxPagesForMemory(usize, usize),
CouldNotProtectMemory(MemoryProtectionError),
CouldNotCreateMemory(MemoryCreationError),
}
impl std::fmt::Display for GrowError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
GrowError::MemoryGrowError => write!(f, "Unable to grow memory"),
GrowError::TableGrowError => write!(f, "Unable to grow table"),
GrowError::ExceededMaxPages(e) => write!(f, "Grow Error: {}", e),
GrowError::ExceededMaxPagesForMemory(left, added) => write!(f, "Failed to add pages because would exceed maximum number of pages for the memory. Left: {}, Added: {}", left, added),
GrowError::CouldNotCreateMemory(e) => write!(f, "Grow Error: {}", e),
GrowError::CouldNotProtectMemory(e) => write!(f, "Grow Error: {}", e),
}
}
}
impl std::error::Error for GrowError {}
#[derive(Debug)]
pub enum PageError {
ExceededMaxPages(usize, usize, usize),
}
impl std::fmt::Display for PageError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
PageError::ExceededMaxPages(left, right, added) => write!(f, "Failed to add pages because would exceed maximum number of pages. Left: {}, Right: {}, Pages added: {}", left, right, added),
}
}
}
impl std::error::Error for PageError {}
impl Into<GrowError> for PageError {
fn into(self) -> GrowError {
GrowError::ExceededMaxPages(self)
}
}
#[derive(Debug)]
pub enum MemoryCreationError {
VirtualMemoryAllocationFailed(usize, String),
CouldNotCreateMemoryFromFile(std::io::Error),
}
impl std::fmt::Display for MemoryCreationError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
MemoryCreationError::VirtualMemoryAllocationFailed(size, msg) => write!(
f,
"Allocation virtual memory with size {} failed. \nErrno message: {}",
size, msg
),
MemoryCreationError::CouldNotCreateMemoryFromFile(e) => write!(f, "IO Error: {}", e),
}
}
}
impl std::error::Error for MemoryCreationError {}
impl Into<GrowError> for MemoryCreationError {
fn into(self) -> GrowError {
GrowError::CouldNotCreateMemory(self)
}
}
impl From<std::io::Error> for MemoryCreationError {
fn from(io_error: std::io::Error) -> Self {
MemoryCreationError::CouldNotCreateMemoryFromFile(io_error)
}
}
#[derive(Debug)]
pub enum MemoryProtectionError {
ProtectionFailed(usize, usize, String),
}
impl std::fmt::Display for MemoryProtectionError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
MemoryProtectionError::ProtectionFailed(start, size, msg) => write!(
f,
"Allocation virtual memory starting at {} with size {} failed. \nErrno message: {}",
start, size, msg
),
}
}
}
impl std::error::Error for MemoryProtectionError {}
impl Into<GrowError> for MemoryProtectionError {
fn into(self) -> GrowError {
GrowError::CouldNotProtectMemory(self)
}
}
#[derive(Debug)]
pub enum ParseError {
BinaryReadError,
}
impl From<wasmparser::BinaryReaderError> for ParseError {
fn from(_: wasmparser::BinaryReaderError) -> Self {
ParseError::BinaryReadError
}
}