Auto merge of #104054 - RalfJung:byte-provenance, r=oli-obk

interpret: support for per-byte provenance

Also factors the provenance map into its own module.

The third commit does the same for the init mask. I can move it in a separate PR if you prefer.

Fixes rust-lang/miri#2181

r? `@oli-obk`

src/constant.rs

@@ -398,7 +398,7 @@ fn define_all_allocs(tcx: TyCtxt<'_>, module: &mut dyn Module, cx: &mut Constant
         let bytes = alloc.inspect_with_uninit_and_ptr_outside_interpreter(0..alloc.len()).to_vec();
         data_ctx.define(bytes.into_boxed_slice());
 
-        for &(offset, alloc_id) in alloc.provenance().iter() {
+        for &(offset, alloc_id) in alloc.provenance().ptrs().iter() {
             let addend = {
                 let endianness = tcx.data_layout.endian;
                 let offset = offset.bytes() as usize;
@@ -431,7 +431,7 @@ fn define_all_allocs(tcx: TyCtxt<'_>, module: &mut dyn Module, cx: &mut Constant
                     {
                         tcx.sess.fatal(&format!(
                             "Allocation {:?} contains reference to TLS value {:?}",
-                            alloc, def_id
+                            alloc_id, def_id
                         ));
                     }