# Enum miri::GlobalAlloc

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    pub enum GlobalAlloc<'tcx> {
        Function(Instance<'tcx>),
        VTable(Ty<'tcx>, Option<Binder<'tcx, ExistentialTraitRef<'tcx>>>),
        Static(DefId),
        Memory(ConstAllocation<'tcx>),
    }

Expand description

An allocation in the global (tcx-managed) memory can be either a function pointer, a static, or a “real” allocation with some data in it.

## Variants§

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### Function(Instance<'tcx>)

The alloc ID is used as a function pointer.

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### VTable(Ty<'tcx>, Option<Binder<'tcx, ExistentialTraitRef<'tcx>>>)

This alloc ID points to a symbolic (not-reified) vtable.

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### Static(DefId)

The alloc ID points to a “lazy” static variable that did not get computed (yet). This is also used to break the cycle in recursive statics.

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### Memory(ConstAllocation<'tcx>)

The alloc ID points to memory.

## Auto Trait Implementations§

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### impl<'tcx> !RefUnwindSafe for GlobalAlloc<'tcx>

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### impl<'tcx> Send for GlobalAlloc<'tcx>

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### impl<'tcx> Sync for GlobalAlloc<'tcx>

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### impl<'tcx> Unpin for GlobalAlloc<'tcx>

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### impl<'tcx> !UnwindSafe for GlobalAlloc<'tcx>

## 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> 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> Same for T

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#### type Output = T

Should always be `Self`
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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.
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

## 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: 40 bytes

Size for each variant:

- `Function`: 36 bytes
- `VTable`: 36 bytes
- `Static`: 8 bytes
- `Memory`: 12 bytes