Enum ReadError 

pub enum ReadError {
    NoMechanism,
    Os(i64),
    Short {
        wanted: usize,
        got: usize,
    },
}

Why a self-image read did not complete.

Variants

NoMechanism

This target has no implemented mechanism.

Os(i64)

The operating system refused the read and reported this status.

mach_vm_read_overwrite’s kern_return_t on Darwin, the value of GetLastError() on Windows. Carried rather than collapsed to a boolean because “the address is not mapped” and “the process lacks the right” are different findings for whoever is holding a module that will not start.

Short

The mechanism succeeded but returned fewer bytes than asked for.

Distinguished from ReadError::Os because a short read with a success status means the request straddled the end of a mapping, which is a statement about the range table rather than about permissions.

Fields

wanted: usize

Bytes requested.

got: usize

Bytes the mechanism actually supplied.

Trait Implementations

impl Debug for ReadError

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

Formats the value using the given formatter.

impl Display for ReadError

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

Formats the value using the given formatter.

impl Error for ReadError

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.