wasm_mutate/
error.rs

1/// An error encountered when choosing or applying a Wasm mutation.
2#[derive(thiserror::Error, Debug)]
3#[error(transparent)]
4pub struct Error {
5    kind: Box<ErrorKind>,
6}
7
8impl Error {
9    /// Construct a new `Error` from an `ErrorKind`.
10    pub fn new(kind: ErrorKind) -> Self {
11        kind.into()
12    }
13
14    /// Construct a new parse error.
15    pub fn parse(err: wasmparser::BinaryReaderError) -> Self {
16        err.into()
17    }
18
19    /// Construct a "no mutations applicable" error.
20    pub fn no_mutations_applicable() -> Self {
21        ErrorKind::NoMutationsApplicable.into()
22    }
23
24    /// Construct an "out of fuel" error.
25    pub fn out_of_fuel() -> Self {
26        ErrorKind::OutOfFuel.into()
27    }
28
29    /// Construct an unsupported error.
30    pub fn unsupported(msg: impl Into<String>) -> Self {
31        ErrorKind::Unsupported(msg.into()).into()
32    }
33
34    /// Construct another kind of `Error`.
35    pub fn other(err: impl Into<String>) -> Self {
36        ErrorKind::Other(err.into()).into()
37    }
38
39    /// Get the kind of error that this is.
40    pub fn kind(&self) -> &ErrorKind {
41        &*self.kind
42    }
43}
44
45impl From<ErrorKind> for Error {
46    fn from(kind: ErrorKind) -> Self {
47        Error {
48            kind: Box::new(kind),
49        }
50    }
51}
52
53impl From<wasmparser::BinaryReaderError> for Error {
54    fn from(e: wasmparser::BinaryReaderError) -> Self {
55        ErrorKind::Parse(e).into()
56    }
57}
58
59impl<E> From<wasm_encoder::reencode::Error<E>> for Error
60where
61    E: Into<Error> + std::fmt::Display,
62{
63    fn from(e: wasm_encoder::reencode::Error<E>) -> Self {
64        match e {
65            wasm_encoder::reencode::Error::ParseError(e) => Error::parse(e),
66            wasm_encoder::reencode::Error::UserError(e) => e.into(),
67            other => Error::other(other.to_string()),
68        }
69    }
70}
71
72impl From<std::convert::Infallible> for Error {
73    fn from(i: std::convert::Infallible) -> Error {
74        match i {}
75    }
76}
77
78/// The kind of error.
79#[derive(thiserror::Error, Debug)]
80pub enum ErrorKind {
81    /// Failed to parse the input Wasm module.
82    #[error("Failed to parse the input Wasm module.")]
83    Parse(#[from] wasmparser::BinaryReaderError),
84
85    /// None of the available mutators are applicable to the input Wasm module
86    #[error("There are not applicable mutations for the input Wasm module.")]
87    NoMutationsApplicable,
88
89    /// Ran out of fuel before a mutation could be applied successfully.
90    #[error("Out of fuel")]
91    OutOfFuel,
92
93    /// The Wasm is using an unsupported feature.
94    #[error("Unsupported: {0}")]
95    Unsupported(String),
96
97    /// Another error.
98    #[error("{0}")]
99    Other(String),
100}
101
102/// A `Result` type that is either `Ok(T)` or `Err(wasm_mutate::Error)`.
103pub type Result<T, E = Error> = std::result::Result<T, E>;
104
105/// A `Result` type for use with `wasm_encoder::reencode`
106pub type ReencodeResult<T, E = Error> = Result<T, wasm_encoder::reencode::Error<E>>;
wasm_mutate/error.rs

wasm_mutate/
error.rs
