Auto merge of rust-lang#2548 - RalfJung:remove-tls-diagnostics-hack, …

…r=RalfJung

avoid thread-local var indirection for non-halting diagnostics

This hack used to be necessary because Stacked Borrows did not have access to enough parts of the machine. But that got fixed a while ago, so now we can just emit diagnostics directly, which is a lot more reliable.

Needs rust-lang#101985
Fixes rust-lang/miri#2538

rust-version

@@ -1 +1 @@
-2019147c5642c08cdb9ad4cacd97dd1fa4ffa701
+acb8934fd57b3c2740c4abac0a5728c2c9b1423b

src/concurrency/data_race.rs

@@ -438,8 +438,8 @@ impl MemoryCellClocks {
 }
 
 /// Evaluation context extensions.
-impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for MiriEvalContext<'mir, 'tcx> {}
-pub trait EvalContextExt<'mir, 'tcx: 'mir>: MiriEvalContextExt<'mir, 'tcx> {
+impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for MiriInterpCx<'mir, 'tcx> {}
+pub trait EvalContextExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
     /// Atomic variant of read_scalar_at_offset.
     fn read_scalar_at_offset_atomic(
         &self,
@@ -940,8 +940,8 @@ impl VClockAlloc {
     }
 }
 
-impl<'mir, 'tcx: 'mir> EvalContextPrivExt<'mir, 'tcx> for MiriEvalContext<'mir, 'tcx> {}
-trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriEvalContextExt<'mir, 'tcx> {
+impl<'mir, 'tcx: 'mir> EvalContextPrivExt<'mir, 'tcx> for MiriInterpCx<'mir, 'tcx> {}
+trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
     /// Temporarily allow data-races to occur. This should only be used in
     /// one of these cases:
     /// - One of the appropriate `validate_atomic` functions will be called to
@@ -950,7 +950,7 @@ trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriEvalContextExt<'mir, 'tcx> {
     /// cannot be accessed by the interpreted program.
     /// - Execution of the interpreted program execution has halted.
     #[inline]
-    fn allow_data_races_ref<R>(&self, op: impl FnOnce(&MiriEvalContext<'mir, 'tcx>) -> R) -> R {
+    fn allow_data_races_ref<R>(&self, op: impl FnOnce(&MiriInterpCx<'mir, 'tcx>) -> R) -> R {
         let this = self.eval_context_ref();
         if let Some(data_race) = &this.machine.data_race {
             let old = data_race.ongoing_action_data_race_free.replace(true);
@@ -969,7 +969,7 @@ trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriEvalContextExt<'mir, 'tcx> {
     #[inline]
     fn allow_data_races_mut<R>(
         &mut self,
-        op: impl FnOnce(&mut MiriEvalContext<'mir, 'tcx>) -> R,
+        op: impl FnOnce(&mut MiriInterpCx<'mir, 'tcx>) -> R,
     ) -> R {
         let this = self.eval_context_mut();
         if let Some(data_race) = &this.machine.data_race {

src/concurrency/sync.rs

@@ -159,8 +159,8 @@ pub(crate) struct SynchronizationState {
 }
 
 // Private extension trait for local helper methods
-impl<'mir, 'tcx: 'mir> EvalContextExtPriv<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
-trait EvalContextExtPriv<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
+impl<'mir, 'tcx: 'mir> EvalContextExtPriv<'mir, 'tcx> for crate::MiriInterpCx<'mir, 'tcx> {}
+trait EvalContextExtPriv<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
     /// Take a reader out of the queue waiting for the lock.
     /// Returns `true` if some thread got the rwlock.
     #[inline]
@@ -208,8 +208,8 @@ trait EvalContextExtPriv<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
 // cases, the function calls are infallible and it is the client's (shim
 // implementation's) responsibility to detect and deal with erroneous
 // situations.
-impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
-pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
+impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriInterpCx<'mir, 'tcx> {}
+pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
     #[inline]
     /// Create state for a new mutex.
     fn mutex_create(&mut self) -> MutexId {
@@ -222,7 +222,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
     /// otherwise returns the value from the closure
     fn mutex_get_or_create<F>(&mut self, existing: F) -> InterpResult<'tcx, MutexId>
     where
-        F: FnOnce(&mut MiriEvalContext<'mir, 'tcx>, MutexId) -> InterpResult<'tcx, Option<MutexId>>,
+        F: FnOnce(&mut MiriInterpCx<'mir, 'tcx>, MutexId) -> InterpResult<'tcx, Option<MutexId>>,
     {
         let this = self.eval_context_mut();
         let next_index = this.machine.threads.sync.mutexes.next_index();
@@ -322,10 +322,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
     /// otherwise returns the value from the closure
     fn rwlock_get_or_create<F>(&mut self, existing: F) -> InterpResult<'tcx, RwLockId>
     where
-        F: FnOnce(
-            &mut MiriEvalContext<'mir, 'tcx>,
-            RwLockId,
-        ) -> InterpResult<'tcx, Option<RwLockId>>,
+        F: FnOnce(&mut MiriInterpCx<'mir, 'tcx>, RwLockId) -> InterpResult<'tcx, Option<RwLockId>>,
     {
         let this = self.eval_context_mut();
         let next_index = this.machine.threads.sync.rwlocks.next_index();
@@ -492,7 +489,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
     fn condvar_get_or_create<F>(&mut self, existing: F) -> InterpResult<'tcx, CondvarId>
     where
         F: FnOnce(
-            &mut MiriEvalContext<'mir, 'tcx>,
+            &mut MiriInterpCx<'mir, 'tcx>,
             CondvarId,
         ) -> InterpResult<'tcx, Option<CondvarId>>,
     {

src/concurrency/thread.rs

@@ -32,8 +32,9 @@ pub enum SchedulingAction {
 
 /// Timeout callbacks can be created by synchronization primitives to tell the
 /// scheduler that they should be called once some period of time passes.
-type TimeoutCallback<'mir, 'tcx> =
-    Box<dyn FnOnce(&mut InterpCx<'mir, 'tcx, Evaluator<'mir, 'tcx>>) -> InterpResult<'tcx> + 'tcx>;
+type TimeoutCallback<'mir, 'tcx> = Box<
+    dyn FnOnce(&mut InterpCx<'mir, 'tcx, MiriMachine<'mir, 'tcx>>) -> InterpResult<'tcx> + 'tcx,
+>;
 
 /// A thread identifier.
 #[derive(Clone, Copy, Debug, PartialOrd, Ord, PartialEq, Eq, Hash)]
@@ -253,7 +254,7 @@ impl<'mir, 'tcx> Default for ThreadManager<'mir, 'tcx> {
 }
 
 impl<'mir, 'tcx: 'mir> ThreadManager<'mir, 'tcx> {
-    pub(crate) fn init(ecx: &mut MiriEvalContext<'mir, 'tcx>) {
+    pub(crate) fn init(ecx: &mut MiriInterpCx<'mir, 'tcx>) {
         if ecx.tcx.sess.target.os.as_ref() != "windows" {
             // The main thread can *not* be joined on except on windows.
             ecx.machine.threads.threads[ThreadId::new(0)].join_status = ThreadJoinStatus::Detached;
@@ -628,8 +629,8 @@ impl<'mir, 'tcx: 'mir> ThreadManager<'mir, 'tcx> {
 }
 
 // Public interface to thread management.
-impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
-pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
+impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriInterpCx<'mir, 'tcx> {}
+pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
     /// Get a thread-specific allocation id for the given thread-local static.
     /// If needed, allocate a new one.
     fn get_or_create_thread_local_alloc(

src/concurrency/weak_memory.rs

@@ -456,9 +456,9 @@ impl StoreElement {
     }
 }
 
-impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
+impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriInterpCx<'mir, 'tcx> {}
 pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
-    crate::MiriEvalContextExt<'mir, 'tcx>
+    crate::MiriInterpCxExt<'mir, 'tcx>
 {
     // If weak memory emulation is enabled, check if this atomic op imperfectly overlaps with a previous
     // atomic read or write. If it does, then we require it to be ordered (non-racy) with all previous atomic
@@ -502,7 +502,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
         let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr)?;
         if let (
             crate::AllocExtra { weak_memory: Some(alloc_buffers), .. },
-            crate::Evaluator { data_race: Some(global), threads, .. },
+            crate::MiriMachine { data_race: Some(global), threads, .. },
         ) = this.get_alloc_extra_mut(alloc_id)?
         {
             if atomic == AtomicRwOrd::SeqCst {
@@ -544,7 +544,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
                     validate,
                 )?;
                 if global.track_outdated_loads && recency == LoadRecency::Outdated {
-                    register_diagnostic(NonHaltingDiagnostic::WeakMemoryOutdatedLoad);
+                    this.emit_diagnostic(NonHaltingDiagnostic::WeakMemoryOutdatedLoad);
                 }
 
                 return Ok(loaded);
@@ -567,7 +567,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
         let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(dest.ptr)?;
         if let (
             crate::AllocExtra { weak_memory: Some(alloc_buffers), .. },
-            crate::Evaluator { data_race: Some(global), threads, .. },
+            crate::MiriMachine { data_race: Some(global), threads, .. },
         ) = this.get_alloc_extra_mut(alloc_id)?
         {
             if atomic == AtomicWriteOrd::SeqCst {