fmt

Author: The Miri Cronjob Bot

src/tools/miri/src/alloc_addresses/mod.rs

@@ -185,8 +185,11 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
                                         panic!("Miri ran out of memory: cannot create allocation of {size:?} bytes")
                                     });
                                 let ptr = prepared_bytes.as_ptr();
-                                    // Store prepared allocation space to be picked up for use later.
-                                    global_state.prepared_alloc_bytes.try_insert(alloc_id, prepared_bytes).unwrap();
+                                // Store prepared allocation space to be picked up for use later.
+                                global_state
+                                    .prepared_alloc_bytes
+                                    .try_insert(alloc_id, prepared_bytes)
+                                    .unwrap();
                                 ptr
                             } else {
                                 ecx.get_alloc_bytes_unchecked_raw(alloc_id)?
@@ -196,16 +199,19 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
                         }
                         AllocKind::Function | AllocKind::VTable => {
                             // Allocate some dummy memory to get a unique address for this function/vtable.
-                            let alloc_bytes = MiriAllocBytes::from_bytes(&[0u8; 1], Align::from_bytes(1).unwrap());
+                            let alloc_bytes = MiriAllocBytes::from_bytes(
+                                &[0u8; 1],
+                                Align::from_bytes(1).unwrap(),
+                            );
                             // We don't need to expose these bytes as nobody is allowed to access them.
                             let addr = alloc_bytes.as_ptr().addr().try_into().unwrap();
                             // Leak the underlying memory to ensure it remains unique.
                             std::mem::forget(alloc_bytes);
                             addr
                         }
-                        AllocKind::Dead => unreachable!()
+                        AllocKind::Dead => unreachable!(),
                     }
-                } else if let Some((reuse_addr, clock)) = global_state.reuse.take_addr(                    
+                } else if let Some((reuse_addr, clock)) = global_state.reuse.take_addr(
                     &mut *rng,
                     size,
                     align,
@@ -359,7 +365,13 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
 
     // This returns some prepared `MiriAllocBytes`, either because `addr_from_alloc_id` reserved
     // memory space in the past, or by doing the pre-allocation right upon being called.
-    fn get_global_alloc_bytes(&self, id: AllocId, kind: MemoryKind, bytes: &[u8], align: Align) -> InterpResult<'tcx, MiriAllocBytes> {
+    fn get_global_alloc_bytes(
+        &self,
+        id: AllocId,
+        kind: MemoryKind,
+        bytes: &[u8],
+        align: Align,
+    ) -> InterpResult<'tcx, MiriAllocBytes> {
         let ecx = self.eval_context_ref();
         Ok(if ecx.machine.native_lib.is_some() {
             // In native lib mode, MiriAllocBytes for global allocations are handled via `prepared_alloc_bytes`.

src/tools/miri/src/concurrency/thread.rs

@@ -888,8 +888,13 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
             }
             let alloc = this.ctfe_query(|tcx| tcx.eval_static_initializer(def_id))?;
             // We make a full copy of this allocation.
-            let mut alloc =
-                alloc.inner().adjust_from_tcx(&this.tcx, |bytes, align| Ok(MiriAllocBytes::from_bytes(std::borrow::Cow::Borrowed(bytes), align)), |ptr| this.global_root_pointer(ptr))?;
+            let mut alloc = alloc.inner().adjust_from_tcx(
+                &this.tcx,
+                |bytes, align| {
+                    Ok(MiriAllocBytes::from_bytes(std::borrow::Cow::Borrowed(bytes), align))
+                },
+                |ptr| this.global_root_pointer(ptr),
+            )?;
             // This allocation will be deallocated when the thread dies, so it is not in read-only memory.
             alloc.mutability = Mutability::Mut;
             // Create a fresh allocation with this content.

src/tools/miri/src/machine.rs

@@ -1277,12 +1277,12 @@ impl<'tcx> Machine<'tcx> for MiriMachine<'tcx> {
     ) -> InterpResult<'tcx, Cow<'b, Allocation<Self::Provenance, Self::AllocExtra, Self::Bytes>>>
     {
         let kind = Self::GLOBAL_KIND.unwrap().into();
-        let alloc = alloc.adjust_from_tcx(&ecx.tcx,
+        let alloc = alloc.adjust_from_tcx(
+            &ecx.tcx,
             |bytes, align| ecx.get_global_alloc_bytes(id, kind, bytes, align),
             |ptr| ecx.global_root_pointer(ptr),
         )?;
-        let extra =
-            Self::init_alloc_extra(ecx, id, kind, alloc.size(), alloc.align)?;
+        let extra = Self::init_alloc_extra(ecx, id, kind, alloc.size(), alloc.align)?;
         Ok(Cow::Owned(alloc.with_extra(extra)))
     }
 

src/tools/miri/src/shims/native_lib.rs

@@ -240,13 +240,16 @@ fn imm_to_carg<'tcx>(v: ImmTy<'tcx>, cx: &impl HasDataLayout) -> InterpResult<'t
         ty::RawPtr(_, mutability) => {
             // Arbitrary mutable pointer accesses are not currently supported in Miri.
             if mutability.is_mut() {
-                throw_unsup_format!("unsupported mutable pointer type for native call: {}", v.layout.ty);
+                throw_unsup_format!(
+                    "unsupported mutable pointer type for native call: {}",
+                    v.layout.ty
+                );
             } else {
                 let s = v.to_scalar().to_pointer(cx)?.addr();
                 // This relies on the `expose_provenance` in `addr_from_alloc_id`.
                 CArg::RawPtr(std::ptr::with_exposed_provenance_mut(s.bytes_usize()))
             }
-        },
+        }
         _ => throw_unsup_format!("unsupported argument type for native call: {}", v.layout.ty),
     })
 }

src/tools/miri/tests/native-lib/pass/ptr_read_access.rs

@@ -26,7 +26,7 @@ fn test_pointer() {
 fn test_simple() {
     #[repr(C)]
     struct Simple {
-        field: i32
+        field: i32,
     }
 
     extern "C" {
@@ -41,7 +41,7 @@ fn test_simple() {
 // Test function that dereferences nested struct pointers and accesses fields.
 fn test_nested() {
     use std::ptr::NonNull;
-    
+
     #[derive(Debug, PartialEq, Eq)]
     #[repr(C)]
     struct Nested {
@@ -62,7 +62,6 @@ fn test_nested() {
 
 // Test function that dereferences static struct pointers and accesses fields.
 fn test_static() {
-
     #[repr(C)]
     struct Static {
         value: i32,
@@ -72,11 +71,8 @@ fn test_static() {
     extern "C" {
         fn access_static(n_ptr: *const Static) -> i32;
     }
-    
-    static STATIC: Static = Static {
-        value: 9001,
-        recurse: &STATIC,
-    };
+
+    static STATIC: Static = Static { value: 9001, recurse: &STATIC };
 
     assert_eq!(unsafe { access_static(&STATIC) }, 9001);
 }