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StackSpecification

Struct StackSpecification 

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pub struct StackSpecification {
    pub addr: *mut u8,
    pub size: usize,
}
Expand description

Spécification d’une pile pour la création d’un thread (CLONE_VM).

Le pointeur addr désigne l’adresse de base (octet le plus bas) d’une région mémoire valide d’au moins size octets, propriété de l’appelant (typiquement issue d’un mmap anonyme). Le kernel positionne le pointeur de pile de l’enfant au sommet de la région (addr + size) ; sur les deux architectures Air (x86_64, aarch64) la pile croît vers le bas.

Répartition des rôles. La création de thread se fait via clone_thread, qui exige Some(StackSpecification) et valide en amont l’alignement (addr et size multiples de 16) et la taille minimale. Le wrapper de fork clone3 — dont le modèle de retour CloneResult::Child est unsound sur une pile neuve — rejette au contraire Some(StackSpecification) avec Errno::EINVAL (cf. la doc de clone_thread pour la justification kernel : un retour Rust normal sur une pile neuve lit des ordures).

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§addr: *mut u8

Adresse de base de la pile.

§size: usize

Taille de la pile, en octets.

Trait Implementations§

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impl Clone for StackSpecification

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fn clone(&self) -> StackSpecification

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for StackSpecification

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impl Debug for StackSpecification

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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 T
where 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where 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 T
where 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.