1 //! Global machine state as well as implementation of the interpreter engine
5 use std::cell::RefCell;
7 use std::num::NonZeroU64;
8 use std::time::Instant;
10 use rand::rngs::StdRng;
11 use rand::SeedableRng;
13 use rustc_ast::ast::Mutability;
14 use rustc_data_structures::fx::FxHashMap;
16 use rustc_data_structures::static_assert_size;
21 layout::{LayoutCx, LayoutError, LayoutOf, TyAndLayout},
22 Instance, TyCtxt, TypeAndMut,
25 use rustc_span::def_id::{CrateNum, DefId};
26 use rustc_span::symbol::{sym, Symbol};
27 use rustc_target::abi::Size;
28 use rustc_target::spec::abi::Abi;
32 // Some global facts about the emulated machine.
33 pub const PAGE_SIZE: u64 = 4 * 1024; // FIXME: adjust to target architecture
34 pub const STACK_ADDR: u64 = 32 * PAGE_SIZE; // not really about the "stack", but where we start assigning integer addresses to allocations
35 pub const STACK_SIZE: u64 = 16 * PAGE_SIZE; // whatever
36 pub const NUM_CPUS: u64 = 1;
38 /// Extra data stored with each stack frame
39 pub struct FrameData<'tcx> {
40 /// Extra data for Stacked Borrows.
41 pub call_id: stacked_borrows::CallId,
43 /// If this is Some(), then this is a special "catch unwind" frame (the frame of `try_fn`
44 /// called by `try`). When this frame is popped during unwinding a panic,
45 /// we stop unwinding, use the `CatchUnwindData` to handle catching.
46 pub catch_unwind: Option<CatchUnwindData<'tcx>>,
48 /// If `measureme` profiling is enabled, holds timing information
49 /// for the start of this frame. When we finish executing this frame,
50 /// we use this to register a completed event with `measureme`.
51 pub timing: Option<measureme::DetachedTiming>,
54 impl<'tcx> std::fmt::Debug for FrameData<'tcx> {
55 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
56 // Omitting `timing`, it does not support `Debug`.
57 let FrameData { call_id, catch_unwind, timing: _ } = self;
58 f.debug_struct("FrameData")
59 .field("call_id", call_id)
60 .field("catch_unwind", catch_unwind)
65 /// Extra memory kinds
66 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
67 pub enum MiriMemoryKind {
68 /// `__rust_alloc` memory.
72 /// Windows `HeapAlloc` memory.
74 /// Memory for args, errno, and other parts of the machine-managed environment.
75 /// This memory may leak.
77 /// Memory allocated by the runtime (e.g. env vars). Separate from `Machine`
78 /// because we clean it up and leak-check it.
80 /// Globals copied from `tcx`.
81 /// This memory may leak.
83 /// Memory for extern statics.
84 /// This memory may leak.
86 /// Memory for thread-local statics.
87 /// This memory may leak.
91 impl Into<MemoryKind<MiriMemoryKind>> for MiriMemoryKind {
93 fn into(self) -> MemoryKind<MiriMemoryKind> {
94 MemoryKind::Machine(self)
98 impl MayLeak for MiriMemoryKind {
100 fn may_leak(self) -> bool {
101 use self::MiriMemoryKind::*;
103 Rust | C | WinHeap | Runtime => false,
104 Machine | Global | ExternStatic | Tls => true,
109 impl fmt::Display for MiriMemoryKind {
110 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
111 use self::MiriMemoryKind::*;
113 Rust => write!(f, "Rust heap"),
114 C => write!(f, "C heap"),
115 WinHeap => write!(f, "Windows heap"),
116 Machine => write!(f, "machine-managed memory"),
117 Runtime => write!(f, "language runtime memory"),
118 Global => write!(f, "global (static or const)"),
119 ExternStatic => write!(f, "extern static"),
120 Tls => write!(f, "thread-local static"),
125 /// Pointer provenance (tag).
126 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
128 pub alloc_id: AllocId,
129 /// Stacked Borrows tag.
133 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
134 static_assert_size!(Pointer<Tag>, 24);
135 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
136 static_assert_size!(Pointer<Option<Tag>>, 24);
137 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
138 static_assert_size!(ScalarMaybeUninit<Tag>, 32);
140 impl Provenance for Tag {
141 /// We use absolute addresses in the `offset` of a `Pointer<Tag>`.
142 const OFFSET_IS_ADDR: bool = true;
144 /// We cannot err on partial overwrites, it happens too often in practice (due to unions).
145 const ERR_ON_PARTIAL_PTR_OVERWRITE: bool = false;
147 fn fmt(ptr: &Pointer<Self>, f: &mut fmt::Formatter<'_>) -> fmt::Result {
148 let (tag, addr) = ptr.into_parts(); // address is absolute
149 write!(f, "0x{:x}", addr.bytes())?;
150 // Forward `alternate` flag to `alloc_id` printing.
152 write!(f, "[{:#?}]", tag.alloc_id)?;
154 write!(f, "[{:?}]", tag.alloc_id)?;
156 // Print Stacked Borrows tag.
157 write!(f, "{:?}", tag.sb)
160 fn get_alloc_id(self) -> AllocId {
165 /// Extra per-allocation data
166 #[derive(Debug, Clone)]
167 pub struct AllocExtra {
168 /// Stacked Borrows state is only added if it is enabled.
169 pub stacked_borrows: Option<stacked_borrows::AllocExtra>,
170 /// Data race detection via the use of a vector-clock,
171 /// this is only added if it is enabled.
172 pub data_race: Option<data_race::AllocExtra>,
175 /// Precomputed layouts of primitive types
176 pub struct PrimitiveLayouts<'tcx> {
177 pub unit: TyAndLayout<'tcx>,
178 pub i8: TyAndLayout<'tcx>,
179 pub i32: TyAndLayout<'tcx>,
180 pub isize: TyAndLayout<'tcx>,
181 pub u8: TyAndLayout<'tcx>,
182 pub u32: TyAndLayout<'tcx>,
183 pub usize: TyAndLayout<'tcx>,
184 pub bool: TyAndLayout<'tcx>,
185 pub mut_raw_ptr: TyAndLayout<'tcx>,
188 impl<'mir, 'tcx: 'mir> PrimitiveLayouts<'tcx> {
189 fn new(layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Result<Self, LayoutError<'tcx>> {
190 let tcx = layout_cx.tcx;
191 let mut_raw_ptr = tcx.mk_ptr(TypeAndMut { ty: tcx.types.unit, mutbl: Mutability::Mut });
193 unit: layout_cx.layout_of(tcx.mk_unit())?,
194 i8: layout_cx.layout_of(tcx.types.i8)?,
195 i32: layout_cx.layout_of(tcx.types.i32)?,
196 isize: layout_cx.layout_of(tcx.types.isize)?,
197 u8: layout_cx.layout_of(tcx.types.u8)?,
198 u32: layout_cx.layout_of(tcx.types.u32)?,
199 usize: layout_cx.layout_of(tcx.types.usize)?,
200 bool: layout_cx.layout_of(tcx.types.bool)?,
201 mut_raw_ptr: layout_cx.layout_of(mut_raw_ptr)?,
206 /// The machine itself.
207 pub struct Evaluator<'mir, 'tcx> {
208 pub stacked_borrows: Option<stacked_borrows::GlobalState>,
209 pub data_race: Option<data_race::GlobalState>,
210 pub intptrcast: intptrcast::GlobalState,
212 /// Environment variables set by `setenv`.
213 /// Miri does not expose env vars from the host to the emulated program.
214 pub(crate) env_vars: EnvVars<'tcx>,
216 /// Program arguments (`Option` because we can only initialize them after creating the ecx).
217 /// These are *pointers* to argc/argv because macOS.
218 /// We also need the full command line as one string because of Windows.
219 pub(crate) argc: Option<MemPlace<Tag>>,
220 pub(crate) argv: Option<MemPlace<Tag>>,
221 pub(crate) cmd_line: Option<MemPlace<Tag>>,
224 pub(crate) tls: TlsData<'tcx>,
226 /// What should Miri do when an op requires communicating with the host,
227 /// such as accessing host env vars, random number generation, and
228 /// file system access.
229 pub(crate) isolated_op: IsolatedOp,
231 /// Whether to enforce the validity invariant.
232 pub(crate) validate: bool,
234 /// Whether to enforce validity (e.g., initialization) of integers and floats.
235 pub(crate) enforce_number_validity: bool,
237 /// Whether to enforce [ABI](Abi) of function calls.
238 pub(crate) enforce_abi: bool,
240 pub(crate) file_handler: shims::posix::FileHandler,
241 pub(crate) dir_handler: shims::posix::DirHandler,
243 /// The "time anchor" for this machine's monotone clock (for `Instant` simulation).
244 pub(crate) time_anchor: Instant,
246 /// The set of threads.
247 pub(crate) threads: ThreadManager<'mir, 'tcx>,
249 /// Precomputed `TyLayout`s for primitive data types that are commonly used inside Miri.
250 pub(crate) layouts: PrimitiveLayouts<'tcx>,
252 /// Allocations that are considered roots of static memory (that may leak).
253 pub(crate) static_roots: Vec<AllocId>,
255 /// The `measureme` profiler used to record timing information about
256 /// the emulated program.
257 profiler: Option<measureme::Profiler>,
258 /// Used with `profiler` to cache the `StringId`s for event names
259 /// uesd with `measureme`.
260 string_cache: FxHashMap<String, measureme::StringId>,
262 /// Cache of `Instance` exported under the given `Symbol` name.
263 /// `None` means no `Instance` exported under the given name is found.
264 pub(crate) exported_symbols_cache: FxHashMap<Symbol, Option<Instance<'tcx>>>,
266 /// Whether to raise a panic in the context of the evaluated process when unsupported
267 /// functionality is encountered. If `false`, an error is propagated in the Miri application context
268 /// instead (default behavior)
269 pub(crate) panic_on_unsupported: bool,
271 /// Equivalent setting as RUST_BACKTRACE on encountering an error.
272 pub(crate) backtrace_style: BacktraceStyle,
274 /// Crates which are considered local for the purposes of error reporting.
275 pub(crate) local_crates: Vec<CrateNum>,
277 /// Mapping extern static names to their base pointer.
278 extern_statics: FxHashMap<Symbol, Pointer<Tag>>,
280 /// The random number generator used for resolving non-determinism.
281 /// Needs to be queried by ptr_to_int, hence needs interior mutability.
282 pub(crate) rng: RefCell<StdRng>,
284 /// An allocation ID to report when it is being allocated
285 /// (helps for debugging memory leaks and use after free bugs).
286 tracked_alloc_id: Option<AllocId>,
288 /// Controls whether alignment of memory accesses is being checked.
289 pub(crate) check_alignment: AlignmentCheck,
291 /// Failure rate of compare_exchange_weak, between 0.0 and 1.0
292 pub(crate) cmpxchg_weak_failure_rate: f64,
295 impl<'mir, 'tcx> Evaluator<'mir, 'tcx> {
296 pub(crate) fn new(config: &MiriConfig, layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Self {
297 let local_crates = helpers::get_local_crates(&layout_cx.tcx);
299 PrimitiveLayouts::new(layout_cx).expect("Couldn't get layouts of primitive types");
300 let profiler = config.measureme_out.as_ref().map(|out| {
301 measureme::Profiler::new(out).expect("Couldn't create `measureme` profiler")
303 let rng = StdRng::seed_from_u64(config.seed.unwrap_or(0));
304 let stacked_borrows = if config.stacked_borrows {
305 Some(RefCell::new(stacked_borrows::GlobalStateInner::new(
306 config.tracked_pointer_tag,
307 config.tracked_call_id,
314 if config.data_race_detector { Some(data_race::GlobalState::new()) } else { None };
318 intptrcast: RefCell::new(intptrcast::GlobalStateInner::new(config)),
319 // `env_vars` depends on a full interpreter so we cannot properly initialize it yet.
320 env_vars: EnvVars::default(),
324 tls: TlsData::default(),
325 isolated_op: config.isolated_op,
326 validate: config.validate,
327 enforce_number_validity: config.check_number_validity,
328 enforce_abi: config.check_abi,
329 file_handler: Default::default(),
330 dir_handler: Default::default(),
331 time_anchor: Instant::now(),
333 threads: ThreadManager::default(),
334 static_roots: Vec::new(),
336 string_cache: Default::default(),
337 exported_symbols_cache: FxHashMap::default(),
338 panic_on_unsupported: config.panic_on_unsupported,
339 backtrace_style: config.backtrace_style,
341 extern_statics: FxHashMap::default(),
342 rng: RefCell::new(rng),
343 tracked_alloc_id: config.tracked_alloc_id,
344 check_alignment: config.check_alignment,
345 cmpxchg_weak_failure_rate: config.cmpxchg_weak_failure_rate,
349 pub(crate) fn late_init(
350 this: &mut MiriEvalContext<'mir, 'tcx>,
352 ) -> InterpResult<'tcx> {
353 EnvVars::init(this, config)?;
354 Evaluator::init_extern_statics(this)?;
358 fn add_extern_static(
359 this: &mut MiriEvalContext<'mir, 'tcx>,
361 ptr: Pointer<Option<Tag>>,
363 // This got just allocated, so there definitely is a pointer here.
364 let ptr = ptr.into_pointer_or_addr().unwrap();
365 this.machine.extern_statics.try_insert(Symbol::intern(name), ptr).unwrap();
368 /// Sets up the "extern statics" for this machine.
369 fn init_extern_statics(this: &mut MiriEvalContext<'mir, 'tcx>) -> InterpResult<'tcx> {
370 match this.tcx.sess.target.os.as_ref() {
373 Self::add_extern_static(
376 this.machine.env_vars.environ.unwrap().ptr,
378 // A couple zero-initialized pointer-sized extern statics.
379 // Most of them are for weak symbols, which we all set to null (indicating that the
380 // symbol is not supported, and triggering fallback code which ends up calling a
381 // syscall that we do support).
382 for name in &["__cxa_thread_atexit_impl", "getrandom", "statx"] {
383 let layout = this.machine.layouts.usize;
384 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
385 this.write_scalar(Scalar::from_machine_usize(0, this), &place.into())?;
386 Self::add_extern_static(this, name, place.ptr);
391 // This is some obscure hack that is part of the Windows TLS story. It's a `u8`.
392 let layout = this.machine.layouts.u8;
393 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
394 this.write_scalar(Scalar::from_u8(0), &place.into())?;
395 Self::add_extern_static(this, "_tls_used", place.ptr);
397 _ => {} // No "extern statics" supported on this target
402 pub(crate) fn communicate(&self) -> bool {
403 self.isolated_op == IsolatedOp::Allow
406 /// Check whether the stack frame that this `FrameInfo` refers to is part of a local crate.
407 pub(crate) fn is_local(&self, frame: &FrameInfo<'_>) -> bool {
408 let def_id = frame.instance.def_id();
409 def_id.is_local() || self.local_crates.contains(&def_id.krate)
413 /// A rustc InterpCx for Miri.
414 pub type MiriEvalContext<'mir, 'tcx> = InterpCx<'mir, 'tcx, Evaluator<'mir, 'tcx>>;
416 /// A little trait that's useful to be inherited by extension traits.
417 pub trait MiriEvalContextExt<'mir, 'tcx> {
418 fn eval_context_ref<'a>(&'a self) -> &'a MiriEvalContext<'mir, 'tcx>;
419 fn eval_context_mut<'a>(&'a mut self) -> &'a mut MiriEvalContext<'mir, 'tcx>;
421 impl<'mir, 'tcx> MiriEvalContextExt<'mir, 'tcx> for MiriEvalContext<'mir, 'tcx> {
423 fn eval_context_ref(&self) -> &MiriEvalContext<'mir, 'tcx> {
427 fn eval_context_mut(&mut self) -> &mut MiriEvalContext<'mir, 'tcx> {
432 /// Machine hook implementations.
433 impl<'mir, 'tcx> Machine<'mir, 'tcx> for Evaluator<'mir, 'tcx> {
434 type MemoryKind = MiriMemoryKind;
435 type ExtraFnVal = Dlsym;
437 type FrameExtra = FrameData<'tcx>;
438 type AllocExtra = AllocExtra;
440 type PointerTag = Tag;
441 type TagExtra = SbTag;
444 MonoHashMap<AllocId, (MemoryKind<MiriMemoryKind>, Allocation<Tag, Self::AllocExtra>)>;
446 const GLOBAL_KIND: Option<MiriMemoryKind> = Some(MiriMemoryKind::Global);
448 const PANIC_ON_ALLOC_FAIL: bool = false;
451 fn enforce_alignment(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
452 ecx.machine.check_alignment != AlignmentCheck::None
456 fn force_int_for_alignment_check(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
457 ecx.machine.check_alignment == AlignmentCheck::Int
461 fn enforce_validity(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
466 fn enforce_number_validity(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
467 ecx.machine.enforce_number_validity
471 fn enforce_abi(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
472 ecx.machine.enforce_abi
476 fn find_mir_or_eval_fn(
477 ecx: &mut MiriEvalContext<'mir, 'tcx>,
478 instance: ty::Instance<'tcx>,
480 args: &[OpTy<'tcx, Tag>],
481 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
482 unwind: StackPopUnwind,
483 ) -> InterpResult<'tcx, Option<(&'mir mir::Body<'tcx>, ty::Instance<'tcx>)>> {
484 ecx.find_mir_or_eval_fn(instance, abi, args, ret, unwind)
489 ecx: &mut MiriEvalContext<'mir, 'tcx>,
492 args: &[OpTy<'tcx, Tag>],
493 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
494 _unwind: StackPopUnwind,
495 ) -> InterpResult<'tcx> {
496 ecx.call_dlsym(fn_val, abi, args, ret)
501 ecx: &mut MiriEvalContext<'mir, 'tcx>,
502 instance: ty::Instance<'tcx>,
503 args: &[OpTy<'tcx, Tag>],
504 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
505 unwind: StackPopUnwind,
506 ) -> InterpResult<'tcx> {
507 ecx.call_intrinsic(instance, args, ret, unwind)
512 ecx: &mut MiriEvalContext<'mir, 'tcx>,
513 msg: &mir::AssertMessage<'tcx>,
514 unwind: Option<mir::BasicBlock>,
515 ) -> InterpResult<'tcx> {
516 ecx.assert_panic(msg, unwind)
520 fn abort(_ecx: &mut MiriEvalContext<'mir, 'tcx>, msg: String) -> InterpResult<'tcx, !> {
521 throw_machine_stop!(TerminationInfo::Abort(msg))
526 ecx: &MiriEvalContext<'mir, 'tcx>,
528 left: &ImmTy<'tcx, Tag>,
529 right: &ImmTy<'tcx, Tag>,
530 ) -> InterpResult<'tcx, (Scalar<Tag>, bool, ty::Ty<'tcx>)> {
531 ecx.binary_ptr_op(bin_op, left, right)
534 fn thread_local_static_base_pointer(
535 ecx: &mut MiriEvalContext<'mir, 'tcx>,
537 ) -> InterpResult<'tcx, Pointer<Tag>> {
538 ecx.get_or_create_thread_local_alloc(def_id)
541 fn extern_static_base_pointer(
542 ecx: &MiriEvalContext<'mir, 'tcx>,
544 ) -> InterpResult<'tcx, Pointer<Tag>> {
545 let attrs = ecx.tcx.get_attrs(def_id);
546 let link_name = match ecx.tcx.sess.first_attr_value_str_by_name(&attrs, sym::link_name) {
548 None => ecx.tcx.item_name(def_id),
550 if let Some(&ptr) = ecx.machine.extern_statics.get(&link_name) {
553 throw_unsup_format!("`extern` static {:?} is not supported by Miri", def_id)
557 fn init_allocation_extra<'b>(
558 ecx: &MiriEvalContext<'mir, 'tcx>,
560 alloc: Cow<'b, Allocation>,
561 kind: Option<MemoryKind<Self::MemoryKind>>,
562 ) -> Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>> {
563 if Some(id) == ecx.machine.tracked_alloc_id {
564 register_diagnostic(NonHaltingDiagnostic::CreatedAlloc(id));
567 let kind = kind.expect("we set our STATIC_KIND so this cannot be None");
568 let alloc = alloc.into_owned();
569 let stacks = if let Some(stacked_borrows) = &ecx.machine.stacked_borrows {
570 Some(Stacks::new_allocation(id, alloc.size(), stacked_borrows, kind))
574 let race_alloc = if let Some(data_race) = &ecx.machine.data_race {
575 Some(data_race::AllocExtra::new_allocation(&data_race, alloc.size(), kind))
579 let alloc: Allocation<Tag, Self::AllocExtra> = alloc.convert_tag_add_extra(
581 AllocExtra { stacked_borrows: stacks, data_race: race_alloc },
582 |ptr| Evaluator::tag_alloc_base_pointer(ecx, ptr),
587 fn tag_alloc_base_pointer(
588 ecx: &MiriEvalContext<'mir, 'tcx>,
589 ptr: Pointer<AllocId>,
591 let absolute_addr = intptrcast::GlobalStateInner::rel_ptr_to_addr(ecx, ptr);
592 let sb_tag = if let Some(stacked_borrows) = &ecx.machine.stacked_borrows {
593 stacked_borrows.borrow_mut().base_tag(ptr.provenance)
597 Pointer::new(Tag { alloc_id: ptr.provenance, sb: sb_tag }, Size::from_bytes(absolute_addr))
602 ecx: &MiriEvalContext<'mir, 'tcx>,
604 ) -> Pointer<Option<Self::PointerTag>> {
605 intptrcast::GlobalStateInner::ptr_from_addr(addr, ecx)
608 /// Convert a pointer with provenance into an allocation-offset pair,
609 /// or a `None` with an absolute address if that conversion is not possible.
611 ecx: &MiriEvalContext<'mir, 'tcx>,
612 ptr: Pointer<Self::PointerTag>,
613 ) -> (AllocId, Size, Self::TagExtra) {
614 let rel = intptrcast::GlobalStateInner::abs_ptr_to_rel(ecx, ptr);
615 (ptr.provenance.alloc_id, rel, ptr.provenance.sb)
622 alloc_extra: &AllocExtra,
623 (alloc_id, tag): (AllocId, Self::TagExtra),
625 ) -> InterpResult<'tcx> {
626 if let Some(data_race) = &alloc_extra.data_race {
627 data_race.read(alloc_id, range, machine.data_race.as_ref().unwrap())?;
629 if let Some(stacked_borrows) = &alloc_extra.stacked_borrows {
630 stacked_borrows.memory_read(
634 machine.stacked_borrows.as_ref().unwrap(),
645 alloc_extra: &mut AllocExtra,
646 (alloc_id, tag): (AllocId, Self::TagExtra),
648 ) -> InterpResult<'tcx> {
649 if let Some(data_race) = &mut alloc_extra.data_race {
650 data_race.write(alloc_id, range, machine.data_race.as_mut().unwrap())?;
652 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
653 stacked_borrows.memory_written(
657 machine.stacked_borrows.as_mut().unwrap(),
665 fn memory_deallocated(
668 alloc_extra: &mut AllocExtra,
669 (alloc_id, tag): (AllocId, Self::TagExtra),
671 ) -> InterpResult<'tcx> {
672 if Some(alloc_id) == machine.tracked_alloc_id {
673 register_diagnostic(NonHaltingDiagnostic::FreedAlloc(alloc_id));
675 if let Some(data_race) = &mut alloc_extra.data_race {
676 data_race.deallocate(alloc_id, range, machine.data_race.as_mut().unwrap())?;
678 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
679 stacked_borrows.memory_deallocated(
683 machine.stacked_borrows.as_mut().unwrap(),
692 ecx: &mut InterpCx<'mir, 'tcx, Self>,
693 kind: mir::RetagKind,
694 place: &PlaceTy<'tcx, Tag>,
695 ) -> InterpResult<'tcx> {
696 if ecx.machine.stacked_borrows.is_some() { ecx.retag(kind, place) } else { Ok(()) }
701 ecx: &mut InterpCx<'mir, 'tcx, Self>,
702 frame: Frame<'mir, 'tcx, Tag>,
703 ) -> InterpResult<'tcx, Frame<'mir, 'tcx, Tag, FrameData<'tcx>>> {
704 // Start recording our event before doing anything else
705 let timing = if let Some(profiler) = ecx.machine.profiler.as_ref() {
706 let fn_name = frame.instance.to_string();
707 let entry = ecx.machine.string_cache.entry(fn_name.clone());
708 let name = entry.or_insert_with(|| profiler.alloc_string(&*fn_name));
710 Some(profiler.start_recording_interval_event_detached(
712 measureme::EventId::from_label(*name),
713 ecx.get_active_thread().to_u32(),
719 let stacked_borrows = ecx.machine.stacked_borrows.as_ref();
720 let call_id = stacked_borrows.map_or(NonZeroU64::new(1).unwrap(), |stacked_borrows| {
721 stacked_borrows.borrow_mut().new_call()
724 let extra = FrameData { call_id, catch_unwind: None, timing };
725 Ok(frame.with_extra(extra))
729 ecx: &'a InterpCx<'mir, 'tcx, Self>,
730 ) -> &'a [Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>] {
731 ecx.active_thread_stack()
735 ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
736 ) -> &'a mut Vec<Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>> {
737 ecx.active_thread_stack_mut()
741 fn after_stack_push(ecx: &mut InterpCx<'mir, 'tcx, Self>) -> InterpResult<'tcx> {
742 if ecx.machine.stacked_borrows.is_some() { ecx.retag_return_place() } else { Ok(()) }
747 ecx: &mut InterpCx<'mir, 'tcx, Self>,
748 mut frame: Frame<'mir, 'tcx, Tag, FrameData<'tcx>>,
750 ) -> InterpResult<'tcx, StackPopJump> {
751 let timing = frame.extra.timing.take();
752 let res = ecx.handle_stack_pop(frame.extra, unwinding);
753 if let Some(profiler) = ecx.machine.profiler.as_ref() {
754 profiler.finish_recording_interval_event(timing.unwrap());