Add post-initialization hook for static memory initialized using the interpereter.

compiler/rustc_mir/src/interpret/machine.rs

@@ -9,6 +9,7 @@ use std::hash::Hash;
 use rustc_middle::mir;
 use rustc_middle::ty::{self, Ty};
 use rustc_span::def_id::DefId;
+use rustc_target::abi::Size;
 
 use super::{
     AllocId, Allocation, AllocationExtra, CheckInAllocMsg, Frame, ImmTy, InterpCx, InterpResult,
@@ -299,6 +300,15 @@ pub trait Machine<'mir, 'tcx>: Sized {
         Ok(())
     }
 
+    /// Called after initializing static memory using the interpreter.
+    fn after_static_mem_initialized(
+        _ecx: &mut InterpCx<'mir, 'tcx, Self>,
+        _ptr: Pointer<Self::PointerTag>,
+        _size: Size
+    ) -> InterpResult<'tcx> {
+        Ok(())
+    }
+
     /// Executes a retagging operation
     #[inline]
     fn retag(