Enum miri::GlobalAlloc

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

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

Function(Instance<'tcx>)

The alloc ID is used as a function pointer.

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

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

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.

Memory(ConstAllocation<'tcx>)

The alloc ID points to memory.

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