9498d5cf2f
Add direct accessors for memory addresses in `Machine` (for Miri)
The purpose of this PR is to enable direct (immutable) access to memory addresses in `Machine`, which will be needed for further extension of Miri.
This is done by adding (/completing missings pairs of) accessor functions, with the relevant signatures as follows:
```rust
/* rust/compiler/rustc_middle/src/mir/interpret/allocation.rs */
pub trait AllocBytes {
// ..
fn as_ptr(&self) -> *const u8;
/*fn as_mut_ptr(&mut self) -> *mut u8; -- Already in the compiler*/
}
impl<Prov: Provenance, Extra, Bytes: AllocBytes> Allocation<Prov, Extra, Bytes> {
// ..
pub fn get_bytes_unchecked_raw(&self) -> *const u8;
/*pub fn get_bytes_unchecked_raw_mut(&mut self) -> *mut u8; -- Already in the compiler*/
}
```
```rust
/* rust/compiler/rustc_const_eval/src/interpret/memory.rs */
impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
// ..
pub fn get_alloc_bytes_unchecked_raw(&self, id: AllocId) -> InterpResult<'tcx, *const u8>;
pub fn get_alloc_bytes_unchecked_raw_mut(&mut self, id: AllocId) -> InterpResult<'tcx, *mut u8>;
}
```
r? ``@RalfJung``
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