pub struct AbortUnwindingCalls;
Expand description

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.

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

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

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fn name(&self) -> &'static str

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fn profiler_name(&self) -> &'static str

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

Returns true if this pass is enabled with the current combination of compiler flags.
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fn is_mir_dump_enabled(&self) -> bool

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impl PartialEq<AbortUnwindingCalls> for AbortUnwindingCalls

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

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

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

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