Enum Error 

#[non_exhaustive]
pub enum Error {
    Backend {
        message: String,
        source: Option<Box<dyn Error + Send + Sync + 'static>>,
    },
    MemoryOutOfRange(String),
    InvalidProtection(String),
    Unsupported(&'static str),
    InvalidVcpuState(&'static str),
    InvalidArgument(String),
}

Errors that can surface from a hypervisor backend, a vCPU, or a memory operation.

Variants are intentionally coarse — backend-specific error context is captured in the source field of Error::Backend so consumers can downcast without coupling to a specific backend’s error enum.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Backend

A backend (HVF, VZ, mock) reported a failure while executing a hypervisor operation.

Fields

message: String

Human-readable message from the backend.

source: Option<Box<dyn Error + Send + Sync + 'static>>

Optional underlying error returned by the backend SDK.

MemoryOutOfRange(String)

A guest memory operation referenced an address or range that is not mapped.

InvalidProtection(String)

A guest memory operation requested an unsupported protection change.

Unsupported(&'static str)

The capability the caller requested is not implemented by the active backend.

InvalidVcpuState(&'static str)

A vCPU was driven from an unexpected lifecycle state.

InvalidArgument(String)

The argument supplied by the caller was rejected by validation.

Implementations

impl Error

pub fn backend(message: impl Into<String>) -> Self

Build a Error::Backend from a static message.

pub fn backend_source<E>(message: impl Into<String>, source: E) -> Self

where E: Error + Send + Sync + 'static,

Build a Error::Backend from a message and a wrapped source error.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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.