Enum wasmer_vm::trap::trap::Trap

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pub enum Trap {
    User(Box<dyn Error + Send + Sync>),
    Wasm {
        pc: usize,
        backtrace: Backtrace,
        signal_trap: Option<TrapCode>,
    },
    Lib {
        trap_code: TrapCode,
        backtrace: Backtrace,
    },
    OOM {
        backtrace: Backtrace,
    },
}
Expand description

Stores trace message with backtrace.

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User(Box<dyn Error + Send + Sync>)

A user-raised trap through raise_user_trap.

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Wasm

A trap raised from the Wasm generated code

Note: this trap is deterministic (assuming a deterministic host implementation)

Fields

§pc: usize

The program counter in generated code where this trap happened.

§backtrace: Backtrace

Native stack backtrace at the time the trap occurred

§signal_trap: Option<TrapCode>

Optional trapcode associated to the signal that caused the trap

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Lib

A trap raised from a wasm libcall

Note: this trap is deterministic (assuming a deterministic host implementation)

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§trap_code: TrapCode

Code of the trap.

§backtrace: Backtrace

Native stack backtrace at the time the trap occurred

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OOM

A trap indicating that the runtime was unable to allocate sufficient memory.

Note: this trap is nondeterministic, since it depends on the host system.

Fields

§backtrace: Backtrace

Native stack backtrace at the time the OOM occurred

Implementations§

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impl Trap

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pub fn user(err: Box<dyn Error + Send + Sync>) -> Self

Construct a new Error with the given a user error.

Internally saves a backtrace when constructed.

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pub fn wasm( pc: usize, backtrace: Backtrace, signal_trap: Option<TrapCode>, ) -> Self

Construct a new Wasm trap with the given source location and backtrace.

Internally saves a backtrace when constructed.

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pub fn to_trap(self) -> Option<TrapCode>

Returns trap code, if it’s a Trap

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pub fn lib(trap_code: TrapCode) -> Self

Construct a new Wasm trap with the given trap code.

Internally saves a backtrace when constructed.

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pub fn oom() -> Self

Construct a new OOM trap with the given source location and trap code.

Internally saves a backtrace when constructed.

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pub fn downcast<T: Error + 'static>(self) -> Result<T, Self>

Attempts to downcast the Trap to a concrete type.

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pub fn downcast_ref<T: Error + 'static>(&self) -> Option<&T>

Attempts to downcast the Trap to a concrete type.

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pub fn is<T: Error + 'static>(&self) -> bool

Returns true if the Trap is the same as T

Trait Implementations§

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impl Debug for Trap

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for Trap

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Error for Trap

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fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any. Read more
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fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
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fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type based access to context intended for error reports. Read more

Auto Trait Implementations§

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impl Freeze for Trap

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impl !RefUnwindSafe for Trap

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impl Send for Trap

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impl Sync for Trap

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impl Unpin for Trap

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impl !UnwindSafe for Trap

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> ArchivePointee for T

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type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.
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fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> LayoutRaw for T

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fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

Returns the layout of the type.
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impl<T> Pointee for T

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type Metadata = ()

The metadata type for pointers and references to this type.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.