diff options
Diffstat (limited to 'compiler/rustc_const_eval/src/interpret/machine.rs')
| -rw-r--r-- | compiler/rustc_const_eval/src/interpret/machine.rs | 111 |
1 files changed, 54 insertions, 57 deletions
diff --git a/compiler/rustc_const_eval/src/interpret/machine.rs b/compiler/rustc_const_eval/src/interpret/machine.rs index 72a16dbe4d6..5713e7bd82b 100644 --- a/compiler/rustc_const_eval/src/interpret/machine.rs +++ b/compiler/rustc_const_eval/src/interpret/machine.rs @@ -94,7 +94,7 @@ pub trait AllocMap<K: Hash + Eq, V> { /// Methods of this trait signifies a point where CTFE evaluation would fail /// and some use case dependent behaviour can instead be applied. -pub trait Machine<'mir, 'tcx: 'mir>: Sized { +pub trait Machine<'tcx>: Sized { /// Additional memory kinds a machine wishes to distinguish from the builtin ones type MemoryKind: Debug + std::fmt::Display + MayLeak + Eq + 'static; @@ -145,12 +145,12 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { const ALL_CONSTS_ARE_PRECHECKED: bool = true; /// Whether memory accesses should be alignment-checked. - fn enforce_alignment(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool; + fn enforce_alignment(ecx: &InterpCx<'tcx, Self>) -> bool; /// Gives the machine a chance to detect more misalignment than the built-in checks would catch. #[inline(always)] fn alignment_check( - _ecx: &InterpCx<'mir, 'tcx, Self>, + _ecx: &InterpCx<'tcx, Self>, _alloc_id: AllocId, _alloc_align: Align, _alloc_kind: AllocKind, @@ -161,22 +161,22 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { } /// Whether to enforce the validity invariant for a specific layout. - fn enforce_validity(ecx: &InterpCx<'mir, 'tcx, Self>, layout: TyAndLayout<'tcx>) -> bool; + fn enforce_validity(ecx: &InterpCx<'tcx, Self>, layout: TyAndLayout<'tcx>) -> bool; /// Whether function calls should be [ABI](CallAbi)-checked. - fn enforce_abi(_ecx: &InterpCx<'mir, 'tcx, Self>) -> bool { + fn enforce_abi(_ecx: &InterpCx<'tcx, Self>) -> bool { true } /// Whether Assert(OverflowNeg) and Assert(Overflow) MIR terminators should actually /// check for overflow. - fn ignore_optional_overflow_checks(_ecx: &InterpCx<'mir, 'tcx, Self>) -> bool; + fn ignore_optional_overflow_checks(_ecx: &InterpCx<'tcx, Self>) -> bool; /// Entry point for obtaining the MIR of anything that should get evaluated. /// So not just functions and shims, but also const/static initializers, anonymous /// constants, ... fn load_mir( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, instance: ty::InstanceDef<'tcx>, ) -> InterpResult<'tcx, &'tcx mir::Body<'tcx>> { Ok(ecx.tcx.instance_mir(instance)) @@ -193,19 +193,19 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Passing `dest`and `ret` in the same `Option` proved very annoying when only one of them /// was used. fn find_mir_or_eval_fn( - ecx: &mut InterpCx<'mir, 'tcx, Self>, + ecx: &mut InterpCx<'tcx, Self>, instance: ty::Instance<'tcx>, abi: CallAbi, args: &[FnArg<'tcx, Self::Provenance>], destination: &MPlaceTy<'tcx, Self::Provenance>, target: Option<mir::BasicBlock>, unwind: mir::UnwindAction, - ) -> InterpResult<'tcx, Option<(&'mir mir::Body<'tcx>, ty::Instance<'tcx>)>>; + ) -> InterpResult<'tcx, Option<(&'tcx mir::Body<'tcx>, ty::Instance<'tcx>)>>; /// Execute `fn_val`. It is the hook's responsibility to advance the instruction /// pointer as appropriate. fn call_extra_fn( - ecx: &mut InterpCx<'mir, 'tcx, Self>, + ecx: &mut InterpCx<'tcx, Self>, fn_val: Self::ExtraFnVal, abi: CallAbi, args: &[FnArg<'tcx, Self::Provenance>], @@ -220,7 +220,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Returns `None` if the intrinsic was fully handled. /// Otherwise, returns an `Instance` of the function that implements the intrinsic. fn call_intrinsic( - ecx: &mut InterpCx<'mir, 'tcx, Self>, + ecx: &mut InterpCx<'tcx, Self>, instance: ty::Instance<'tcx>, args: &[OpTy<'tcx, Self::Provenance>], destination: &MPlaceTy<'tcx, Self::Provenance>, @@ -230,17 +230,17 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Called to evaluate `Assert` MIR terminators that trigger a panic. fn assert_panic( - ecx: &mut InterpCx<'mir, 'tcx, Self>, + ecx: &mut InterpCx<'tcx, Self>, msg: &mir::AssertMessage<'tcx>, unwind: mir::UnwindAction, ) -> InterpResult<'tcx>; /// Called to trigger a non-unwinding panic. - fn panic_nounwind(_ecx: &mut InterpCx<'mir, 'tcx, Self>, msg: &str) -> InterpResult<'tcx>; + fn panic_nounwind(_ecx: &mut InterpCx<'tcx, Self>, msg: &str) -> InterpResult<'tcx>; /// Called when unwinding reached a state where execution should be terminated. fn unwind_terminate( - ecx: &mut InterpCx<'mir, 'tcx, Self>, + ecx: &mut InterpCx<'tcx, Self>, reason: mir::UnwindTerminateReason, ) -> InterpResult<'tcx>; @@ -248,7 +248,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// /// Returns a (value, overflowed) pair if the operation succeeded fn binary_ptr_op( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, bin_op: mir::BinOp, left: &ImmTy<'tcx, Self::Provenance>, right: &ImmTy<'tcx, Self::Provenance>, @@ -257,7 +257,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Generate the NaN returned by a float operation, given the list of inputs. /// (This is all inputs, not just NaN inputs!) fn generate_nan<F1: Float + FloatConvert<F2>, F2: Float>( - _ecx: &InterpCx<'mir, 'tcx, Self>, + _ecx: &InterpCx<'tcx, Self>, _inputs: &[F1], ) -> F2 { // By default we always return the preferred NaN. @@ -266,14 +266,14 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Called before a basic block terminator is executed. #[inline] - fn before_terminator(_ecx: &mut InterpCx<'mir, 'tcx, Self>) -> InterpResult<'tcx> { + fn before_terminator(_ecx: &mut InterpCx<'tcx, Self>) -> InterpResult<'tcx> { Ok(()) } /// Called when the interpreter encounters a `StatementKind::ConstEvalCounter` instruction. /// You can use this to detect long or endlessly running programs. #[inline] - fn increment_const_eval_counter(_ecx: &mut InterpCx<'mir, 'tcx, Self>) -> InterpResult<'tcx> { + fn increment_const_eval_counter(_ecx: &mut InterpCx<'tcx, Self>) -> InterpResult<'tcx> { Ok(()) } @@ -293,7 +293,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Return the `AllocId` for the given thread-local static in the current thread. fn thread_local_static_pointer( - _ecx: &mut InterpCx<'mir, 'tcx, Self>, + _ecx: &mut InterpCx<'tcx, Self>, def_id: DefId, ) -> InterpResult<'tcx, Pointer<Self::Provenance>> { throw_unsup!(ThreadLocalStatic(def_id)) @@ -301,20 +301,20 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Return the `AllocId` for the given `extern static`. fn extern_static_pointer( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, def_id: DefId, ) -> InterpResult<'tcx, Pointer<Self::Provenance>>; /// "Int-to-pointer cast" fn ptr_from_addr_cast( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, addr: u64, ) -> InterpResult<'tcx, Pointer<Option<Self::Provenance>>>; /// Marks a pointer as exposed, allowing it's provenance /// to be recovered. "Pointer-to-int cast" fn expose_ptr( - ecx: &mut InterpCx<'mir, 'tcx, Self>, + ecx: &mut InterpCx<'tcx, Self>, ptr: Pointer<Self::Provenance>, ) -> InterpResult<'tcx>; @@ -325,7 +325,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// /// When this fails, that means the pointer does not point to a live allocation. fn ptr_get_alloc( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, ptr: Pointer<Self::Provenance>, ) -> Option<(AllocId, Size, Self::ProvenanceExtra)>; @@ -345,7 +345,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// cache the result. (This relies on `AllocMap::get_or` being able to add the /// owned allocation to the map even when the map is shared.) fn adjust_allocation<'b>( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, id: AllocId, alloc: Cow<'b, Allocation>, kind: Option<MemoryKind<Self::MemoryKind>>, @@ -359,7 +359,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// `kind` is the kind of the allocation the pointer points to; it can be `None` when /// it's a global and `GLOBAL_KIND` is `None`. fn adjust_alloc_root_pointer( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, ptr: Pointer, kind: Option<MemoryKind<Self::MemoryKind>>, ) -> InterpResult<'tcx, Pointer<Self::Provenance>>; @@ -370,7 +370,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// is triggered, `targets[0]` when the assembly falls through, or diverge in case of /// `InlineAsmOptions::NORETURN` being set. fn eval_inline_asm( - _ecx: &mut InterpCx<'mir, 'tcx, Self>, + _ecx: &mut InterpCx<'tcx, Self>, _template: &'tcx [InlineAsmTemplatePiece], _operands: &[mir::InlineAsmOperand<'tcx>], _options: InlineAsmOptions, @@ -406,10 +406,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// /// Used to prevent statics from self-initializing by reading from their own memory /// as it is being initialized. - fn before_alloc_read( - _ecx: &InterpCx<'mir, 'tcx, Self>, - _alloc_id: AllocId, - ) -> InterpResult<'tcx> { + fn before_alloc_read(_ecx: &InterpCx<'tcx, Self>, _alloc_id: AllocId) -> InterpResult<'tcx> { Ok(()) } @@ -444,7 +441,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Returns the possibly adjusted pointer. #[inline] fn retag_ptr_value( - _ecx: &mut InterpCx<'mir, 'tcx, Self>, + _ecx: &mut InterpCx<'tcx, Self>, _kind: mir::RetagKind, val: &ImmTy<'tcx, Self::Provenance>, ) -> InterpResult<'tcx, ImmTy<'tcx, Self::Provenance>> { @@ -455,7 +452,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Replaces all pointers stored in the given place. #[inline] fn retag_place_contents( - _ecx: &mut InterpCx<'mir, 'tcx, Self>, + _ecx: &mut InterpCx<'tcx, Self>, _kind: mir::RetagKind, _place: &PlaceTy<'tcx, Self::Provenance>, ) -> InterpResult<'tcx> { @@ -467,7 +464,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// These places need to be protected to make sure the program cannot tell whether the /// argument/return value was actually copied or passed in-place.. fn protect_in_place_function_argument( - ecx: &mut InterpCx<'mir, 'tcx, Self>, + ecx: &mut InterpCx<'tcx, Self>, mplace: &MPlaceTy<'tcx, Self::Provenance>, ) -> InterpResult<'tcx> { // Without an aliasing model, all we can do is put `Uninit` into the place. @@ -477,29 +474,29 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// Called immediately before a new stack frame gets pushed. fn init_frame_extra( - ecx: &mut InterpCx<'mir, 'tcx, Self>, - frame: Frame<'mir, 'tcx, Self::Provenance>, - ) -> InterpResult<'tcx, Frame<'mir, 'tcx, Self::Provenance, Self::FrameExtra>>; + ecx: &mut InterpCx<'tcx, Self>, + frame: Frame<'tcx, Self::Provenance>, + ) -> InterpResult<'tcx, Frame<'tcx, Self::Provenance, Self::FrameExtra>>; /// Borrow the current thread's stack. fn stack<'a>( - ecx: &'a InterpCx<'mir, 'tcx, Self>, - ) -> &'a [Frame<'mir, 'tcx, Self::Provenance, Self::FrameExtra>]; + ecx: &'a InterpCx<'tcx, Self>, + ) -> &'a [Frame<'tcx, Self::Provenance, Self::FrameExtra>]; /// Mutably borrow the current thread's stack. fn stack_mut<'a>( - ecx: &'a mut InterpCx<'mir, 'tcx, Self>, - ) -> &'a mut Vec<Frame<'mir, 'tcx, Self::Provenance, Self::FrameExtra>>; + ecx: &'a mut InterpCx<'tcx, Self>, + ) -> &'a mut Vec<Frame<'tcx, Self::Provenance, Self::FrameExtra>>; /// Called immediately after a stack frame got pushed and its locals got initialized. - fn after_stack_push(_ecx: &mut InterpCx<'mir, 'tcx, Self>) -> InterpResult<'tcx> { + fn after_stack_push(_ecx: &mut InterpCx<'tcx, Self>) -> InterpResult<'tcx> { Ok(()) } /// Called just before the return value is copied to the caller-provided return place. fn before_stack_pop( - _ecx: &InterpCx<'mir, 'tcx, Self>, - _frame: &Frame<'mir, 'tcx, Self::Provenance, Self::FrameExtra>, + _ecx: &InterpCx<'tcx, Self>, + _frame: &Frame<'tcx, Self::Provenance, Self::FrameExtra>, ) -> InterpResult<'tcx> { Ok(()) } @@ -508,8 +505,8 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// The `locals` have already been destroyed! #[inline(always)] fn after_stack_pop( - _ecx: &mut InterpCx<'mir, 'tcx, Self>, - _frame: Frame<'mir, 'tcx, Self::Provenance, Self::FrameExtra>, + _ecx: &mut InterpCx<'tcx, Self>, + _frame: Frame<'tcx, Self::Provenance, Self::FrameExtra>, unwinding: bool, ) -> InterpResult<'tcx, StackPopJump> { // By default, we do not support unwinding from panics @@ -521,7 +518,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// but before the local's stack frame is updated to point to that memory. #[inline(always)] fn after_local_allocated( - _ecx: &mut InterpCx<'mir, 'tcx, Self>, + _ecx: &mut InterpCx<'tcx, Self>, _local: mir::Local, _mplace: &MPlaceTy<'tcx, Self::Provenance>, ) -> InterpResult<'tcx> { @@ -532,7 +529,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// but this hook has the chance to do some pre/postprocessing. #[inline(always)] fn eval_mir_constant<F>( - ecx: &InterpCx<'mir, 'tcx, Self>, + ecx: &InterpCx<'tcx, Self>, val: mir::Const<'tcx>, span: Span, layout: Option<TyAndLayout<'tcx>>, @@ -540,7 +537,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { ) -> InterpResult<'tcx, OpTy<'tcx, Self::Provenance>> where F: Fn( - &InterpCx<'mir, 'tcx, Self>, + &InterpCx<'tcx, Self>, mir::Const<'tcx>, Span, Option<TyAndLayout<'tcx>>, @@ -552,7 +549,7 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized { /// A lot of the flexibility above is just needed for `Miri`, but all "compile-time" machines /// (CTFE and ConstProp) use the same instance. Here, we share that code. -pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { +pub macro compile_time_machine(<$tcx: lifetime>) { type Provenance = CtfeProvenance; type ProvenanceExtra = bool; // the "immutable" flag @@ -567,13 +564,13 @@ pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { type Bytes = Box<[u8]>; #[inline(always)] - fn ignore_optional_overflow_checks(_ecx: &InterpCx<$mir, $tcx, Self>) -> bool { + fn ignore_optional_overflow_checks(_ecx: &InterpCx<$tcx, Self>) -> bool { false } #[inline(always)] fn unwind_terminate( - _ecx: &mut InterpCx<$mir, $tcx, Self>, + _ecx: &mut InterpCx<$tcx, Self>, _reason: mir::UnwindTerminateReason, ) -> InterpResult<$tcx> { unreachable!("unwinding cannot happen during compile-time evaluation") @@ -581,7 +578,7 @@ pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { #[inline(always)] fn call_extra_fn( - _ecx: &mut InterpCx<$mir, $tcx, Self>, + _ecx: &mut InterpCx<$tcx, Self>, fn_val: !, _abi: CallAbi, _args: &[FnArg<$tcx>], @@ -594,7 +591,7 @@ pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { #[inline(always)] fn adjust_allocation<'b>( - _ecx: &InterpCx<$mir, $tcx, Self>, + _ecx: &InterpCx<$tcx, Self>, _id: AllocId, alloc: Cow<'b, Allocation>, _kind: Option<MemoryKind<Self::MemoryKind>>, @@ -603,7 +600,7 @@ pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { } fn extern_static_pointer( - ecx: &InterpCx<$mir, $tcx, Self>, + ecx: &InterpCx<$tcx, Self>, def_id: DefId, ) -> InterpResult<$tcx, Pointer> { // Use the `AllocId` associated with the `DefId`. Any actual *access* will fail. @@ -612,7 +609,7 @@ pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { #[inline(always)] fn adjust_alloc_root_pointer( - _ecx: &InterpCx<$mir, $tcx, Self>, + _ecx: &InterpCx<$tcx, Self>, ptr: Pointer<CtfeProvenance>, _kind: Option<MemoryKind<Self::MemoryKind>>, ) -> InterpResult<$tcx, Pointer<CtfeProvenance>> { @@ -621,7 +618,7 @@ pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { #[inline(always)] fn ptr_from_addr_cast( - _ecx: &InterpCx<$mir, $tcx, Self>, + _ecx: &InterpCx<$tcx, Self>, addr: u64, ) -> InterpResult<$tcx, Pointer<Option<CtfeProvenance>>> { // Allow these casts, but make the pointer not dereferenceable. @@ -632,7 +629,7 @@ pub macro compile_time_machine(<$mir: lifetime, $tcx: lifetime>) { #[inline(always)] fn ptr_get_alloc( - _ecx: &InterpCx<$mir, $tcx, Self>, + _ecx: &InterpCx<$tcx, Self>, ptr: Pointer<CtfeProvenance>, ) -> Option<(AllocId, Size, Self::ProvenanceExtra)> { // We know `offset` is relative to the allocation, so we can use `into_parts`. |