Struct rustc_mir_transform::abort_unwinding_calls::AbortUnwindingCalls

pub struct AbortUnwindingCalls;

A pass that runs which is targeted at ensuring that codegen guarantees about unwinding are upheld for compilations of panic=abort programs.

When compiling with panic=abort codegen backends generally want to assume that all Rust-defined functions do not unwind, and it’s UB if they actually do unwind. Foreign functions, however, can be declared as “may unwind” via their ABI (e.g. extern "C-unwind"). To uphold the guarantees that Rust-defined functions never unwind a well-behaved Rust program needs to catch unwinding from foreign functions and force them to abort.

This pass walks over all functions calls which may possibly unwind, and if any are found sets their cleanup to a block that aborts the process. This forces all unwinds, in panic=abort mode happening in foreign code, to trigger a process abort.

Trait Implementations

impl<'tcx> MirPass<'tcx> for AbortUnwindingCalls

fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>)

fn name(&self) -> Cow<'_, str>

fn is_enabled(&self, _sess: &Session) -> bool

Returns true if this pass is enabled with the current combination of compiler flags.

fn phase_change(&self) -> Option<MirPhase>

If this pass causes the MIR to enter a new phase, return that phase.

fn is_mir_dump_enabled(&self) -> bool

impl PartialEq<AbortUnwindingCalls> for AbortUnwindingCalls

fn eq(&self, other: &AbortUnwindingCalls) -> 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 StructuralPartialEq for AbortUnwindingCalls

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 0 bytes