Struct gimli::read::cfi::UnwindExpression

pub struct UnwindExpression<T: ReaderOffset> {
    pub offset: T,
    pub length: T,
}

The location of a DWARF expression within an unwind section.

This is stored as an offset and length within the section instead of as a Reader to avoid lifetime issues when reusing UnwindContext.

Example

let expression = unwind_expression.get(&eh_frame)?;
let mut evaluation = expression.evaluation(fde.cie().encoding());
let mut result = evaluation.evaluate()?;
loop {
  match result {
     EvaluationResult::Complete => break,
     // Provide information to the evaluation.
     _ => { unimplemented!()}
  }
}
let value = evaluation.value_result();

Fields

offset: T

The offset of the expression within the section.

length: T

The length of the expression.

Implementations

impl<T: ReaderOffset> UnwindExpression<T>

pub fn get<R, S>(&self, section: &S) -> Result<Expression<R>>

where R: Reader<Offset = T>, S: UnwindSection<R>,

Get the expression from the section.

The offset and length were previously validated when the UnwindExpression was created, so this should not fail.

Trait Implementations

impl<T: Clone + ReaderOffset> Clone for UnwindExpression<T>

fn clone(&self) -> UnwindExpression<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug + ReaderOffset> Debug for UnwindExpression<T>

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

Formats the value using the given formatter.

impl<T: PartialEq + ReaderOffset> PartialEq for UnwindExpression<T>

fn eq(&self, other: &UnwindExpression<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Copy + ReaderOffset> Copy for UnwindExpression<T>

impl<T: Eq + ReaderOffset> Eq for UnwindExpression<T>

impl<T: ReaderOffset> StructuralPartialEq for UnwindExpression<T>