Struct gimli::read::UnwindContext

pub struct UnwindContext<T: ReaderOffset, A: UnwindContextStorage<T> = StoreOnHeap> { /* private fields */ }

Common context needed when evaluating the call frame unwinding information.

By default, this structure is small and allocates its internal storage on the heap using Box during UnwindContext::new.

This can be overridden by providing a custom UnwindContextStorage type parameter. When using a custom storage with in-line arrays, the UnwindContext type itself will be big, so in that case it’s recommended to place UnwindContext on the heap, e.g. using Box::new(UnwindContext::<R, MyCustomStorage>::new_in()).

To avoid re-allocating the context multiple times when evaluating multiple CFI programs, the same UnwindContext can be reused for multiple unwinds.

use gimli::{UnwindContext, UnwindTable};

// An uninitialized context.
let mut ctx = UnwindContext::new();

// Initialize the context by evaluating the CIE's initial instruction program,
// and generate the unwind table.
let mut table = some_fde.rows(&eh_frame, &bases, &mut ctx)?;
while let Some(row) = table.next_row()? {
    // Do stuff with each row...
}

Implementations

impl<T: ReaderOffset> UnwindContext<T>

pub fn new() -> Self

Construct a new call frame unwinding context.

impl<T: ReaderOffset, A: UnwindContextStorage<T>> UnwindContext<T, A>

Signal Safe Methods

These methods are guaranteed not to allocate, acquire locks, or perform any other signal-unsafe operations, if an non-allocating storage is used.

pub fn new_in() -> Self

Construct a new call frame unwinding context.

Trait Implementations

impl<T: Clone + ReaderOffset, A: Clone + UnwindContextStorage<T>> Clone for UnwindContext<T, A>

where A::Stack: Clone,

fn clone(&self) -> UnwindContext<T, A>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: ReaderOffset, S: UnwindContextStorage<T>> Debug for UnwindContext<T, S>

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

Formats the value using the given formatter.

impl<T: ReaderOffset, A: UnwindContextStorage<T>> Default for UnwindContext<T, A>

fn default() -> Self

Returns the “default value” for a type.

impl<T: PartialEq + ReaderOffset, A: PartialEq + UnwindContextStorage<T>> PartialEq for UnwindContext<T, A>

where A::Stack: PartialEq,

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl<T: Eq + ReaderOffset, A: Eq + UnwindContextStorage<T>> Eq for UnwindContext<T, A>

where A::Stack: Eq,

impl<T: ReaderOffset, A: UnwindContextStorage<T>> StructuralPartialEq for UnwindContext<T, A>