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;
19 layout::{LayoutCx, LayoutError, LayoutOf, TyAndLayout},
20 Instance, TyCtxt, TypeAndMut,
23 use rustc_span::def_id::{CrateNum, DefId};
24 use rustc_span::symbol::{sym, Symbol};
25 use rustc_target::abi::Size;
26 use rustc_target::spec::abi::Abi;
30 // Some global facts about the emulated machine.
31 pub const PAGE_SIZE: u64 = 4 * 1024; // FIXME: adjust to target architecture
32 pub const STACK_ADDR: u64 = 32 * PAGE_SIZE; // not really about the "stack", but where we start assigning integer addresses to allocations
33 pub const STACK_SIZE: u64 = 16 * PAGE_SIZE; // whatever
34 pub const NUM_CPUS: u64 = 1;
36 /// Extra data stored with each stack frame
37 pub struct FrameData<'tcx> {
38 /// Extra data for Stacked Borrows.
39 pub call_id: stacked_borrows::CallId,
41 /// If this is Some(), then this is a special "catch unwind" frame (the frame of `try_fn`
42 /// called by `try`). When this frame is popped during unwinding a panic,
43 /// we stop unwinding, use the `CatchUnwindData` to handle catching.
44 pub catch_unwind: Option<CatchUnwindData<'tcx>>,
46 /// If `measureme` profiling is enabled, holds timing information
47 /// for the start of this frame. When we finish executing this frame,
48 /// we use this to register a completed event with `measureme`.
49 pub timing: Option<measureme::DetachedTiming>,
52 impl<'tcx> std::fmt::Debug for FrameData<'tcx> {
53 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
54 // Omitting `timing`, it does not support `Debug`.
55 let FrameData { call_id, catch_unwind, timing: _ } = self;
56 f.debug_struct("FrameData")
57 .field("call_id", call_id)
58 .field("catch_unwind", catch_unwind)
63 /// Extra memory kinds
64 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
65 pub enum MiriMemoryKind {
66 /// `__rust_alloc` memory.
70 /// Windows `HeapAlloc` memory.
72 /// Memory for args, errno, and other parts of the machine-managed environment.
73 /// This memory may leak.
75 /// Memory allocated by the runtime (e.g. env vars). Separate from `Machine`
76 /// because we clean it up and leak-check it.
78 /// Globals copied from `tcx`.
79 /// This memory may leak.
81 /// Memory for extern statics.
82 /// This memory may leak.
84 /// Memory for thread-local statics.
85 /// This memory may leak.
89 impl Into<MemoryKind<MiriMemoryKind>> for MiriMemoryKind {
91 fn into(self) -> MemoryKind<MiriMemoryKind> {
92 MemoryKind::Machine(self)
96 impl MayLeak for MiriMemoryKind {
98 fn may_leak(self) -> bool {
99 use self::MiriMemoryKind::*;
101 Rust | C | WinHeap | Runtime => false,
102 Machine | Global | ExternStatic | Tls => true,
107 impl fmt::Display for MiriMemoryKind {
108 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
109 use self::MiriMemoryKind::*;
111 Rust => write!(f, "Rust heap"),
112 C => write!(f, "C heap"),
113 WinHeap => write!(f, "Windows heap"),
114 Machine => write!(f, "machine-managed memory"),
115 Runtime => write!(f, "language runtime memory"),
116 Global => write!(f, "global (static or const)"),
117 ExternStatic => write!(f, "extern static"),
118 Tls => write!(f, "thread-local static"),
123 /// Pointer provenance (tag).
124 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
126 pub alloc_id: AllocId,
127 /// Stacked Borrows tag.
131 impl Provenance for Tag {
132 /// We use absolute addresses in the `offset` of a `Pointer<Tag>`.
133 const OFFSET_IS_ADDR: bool = true;
135 /// We cannot err on partial overwrites, it happens too often in practice (due to unions).
136 const ERR_ON_PARTIAL_PTR_OVERWRITE: bool = false;
138 fn fmt(ptr: &Pointer<Self>, f: &mut fmt::Formatter<'_>) -> fmt::Result {
139 let (tag, addr) = ptr.into_parts(); // address is absolute
140 write!(f, "0x{:x}", addr.bytes())?;
141 // Forward `alternate` flag to `alloc_id` printing.
143 write!(f, "[{:#?}]", tag.alloc_id)?;
145 write!(f, "[{:?}]", tag.alloc_id)?;
147 // Print Stacked Borrows tag.
148 write!(f, "{:?}", tag.sb)
151 fn get_alloc_id(self) -> AllocId {
156 /// Extra per-allocation data
157 #[derive(Debug, Clone)]
158 pub struct AllocExtra {
159 /// Stacked Borrows state is only added if it is enabled.
160 pub stacked_borrows: Option<stacked_borrows::AllocExtra>,
161 /// Data race detection via the use of a vector-clock,
162 /// this is only added if it is enabled.
163 pub data_race: Option<data_race::AllocExtra>,
166 /// Extra global memory data
168 pub struct MemoryExtra {
169 pub stacked_borrows: Option<stacked_borrows::MemoryExtra>,
170 pub data_race: Option<data_race::MemoryExtra>,
171 pub intptrcast: intptrcast::MemoryExtra,
173 /// Mapping extern static names to their base pointer.
174 extern_statics: FxHashMap<Symbol, Pointer<Tag>>,
176 /// The random number generator used for resolving non-determinism.
177 /// Needs to be queried by ptr_to_int, hence needs interior mutability.
178 pub(crate) rng: RefCell<StdRng>,
180 /// An allocation ID to report when it is being allocated
181 /// (helps for debugging memory leaks and use after free bugs).
182 tracked_alloc_id: Option<AllocId>,
184 /// Controls whether alignment of memory accesses is being checked.
185 pub(crate) check_alignment: AlignmentCheck,
187 /// Failure rate of compare_exchange_weak, between 0.0 and 1.0
188 pub(crate) cmpxchg_weak_failure_rate: f64,
192 pub fn new(config: &MiriConfig) -> Self {
193 let rng = StdRng::seed_from_u64(config.seed.unwrap_or(0));
194 let stacked_borrows = if config.stacked_borrows {
195 Some(RefCell::new(stacked_borrows::GlobalState::new(
196 config.tracked_pointer_tag,
197 config.tracked_call_id,
204 if config.data_race_detector { Some(data_race::GlobalState::new()) } else { None };
208 intptrcast: RefCell::new(intptrcast::GlobalState::new(config)),
209 extern_statics: FxHashMap::default(),
210 rng: RefCell::new(rng),
211 tracked_alloc_id: config.tracked_alloc_id,
212 check_alignment: config.check_alignment,
213 cmpxchg_weak_failure_rate: config.cmpxchg_weak_failure_rate,
217 fn add_extern_static<'tcx, 'mir>(
218 this: &mut MiriEvalContext<'mir, 'tcx>,
220 ptr: Pointer<Option<Tag>>,
222 let ptr = ptr.into_pointer_or_addr().unwrap();
223 this.memory.extra.extern_statics.try_insert(Symbol::intern(name), ptr).unwrap();
226 /// Sets up the "extern statics" for this machine.
227 pub fn init_extern_statics<'tcx, 'mir>(
228 this: &mut MiriEvalContext<'mir, 'tcx>,
229 ) -> InterpResult<'tcx> {
230 match this.tcx.sess.target.os.as_str() {
233 Self::add_extern_static(
236 this.machine.env_vars.environ.unwrap().ptr,
238 // A couple zero-initialized pointer-sized extern statics.
239 // Most of them are for weak symbols, which we all set to null (indicating that the
240 // symbol is not supported, and triggering fallback code which ends up calling a
241 // syscall that we do support).
242 for name in &["__cxa_thread_atexit_impl", "getrandom", "statx"] {
243 let layout = this.machine.layouts.usize;
244 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
245 this.write_scalar(Scalar::from_machine_usize(0, this), &place.into())?;
246 Self::add_extern_static(this, name, place.ptr);
251 // This is some obscure hack that is part of the Windows TLS story. It's a `u8`.
252 let layout = this.machine.layouts.u8;
253 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
254 this.write_scalar(Scalar::from_u8(0), &place.into())?;
255 Self::add_extern_static(this, "_tls_used", place.ptr);
257 _ => {} // No "extern statics" supported on this target
263 /// Precomputed layouts of primitive types
264 pub struct PrimitiveLayouts<'tcx> {
265 pub unit: TyAndLayout<'tcx>,
266 pub i8: TyAndLayout<'tcx>,
267 pub i32: TyAndLayout<'tcx>,
268 pub isize: TyAndLayout<'tcx>,
269 pub u8: TyAndLayout<'tcx>,
270 pub u32: TyAndLayout<'tcx>,
271 pub usize: TyAndLayout<'tcx>,
272 pub bool: TyAndLayout<'tcx>,
273 pub mut_raw_ptr: TyAndLayout<'tcx>,
276 impl<'mir, 'tcx: 'mir> PrimitiveLayouts<'tcx> {
277 fn new(layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Result<Self, LayoutError<'tcx>> {
278 let tcx = layout_cx.tcx;
279 let mut_raw_ptr = tcx.mk_ptr(TypeAndMut { ty: tcx.types.unit, mutbl: Mutability::Mut });
281 unit: layout_cx.layout_of(tcx.mk_unit())?,
282 i8: layout_cx.layout_of(tcx.types.i8)?,
283 i32: layout_cx.layout_of(tcx.types.i32)?,
284 isize: layout_cx.layout_of(tcx.types.isize)?,
285 u8: layout_cx.layout_of(tcx.types.u8)?,
286 u32: layout_cx.layout_of(tcx.types.u32)?,
287 usize: layout_cx.layout_of(tcx.types.usize)?,
288 bool: layout_cx.layout_of(tcx.types.bool)?,
289 mut_raw_ptr: layout_cx.layout_of(mut_raw_ptr)?,
294 /// The machine itself.
295 pub struct Evaluator<'mir, 'tcx> {
296 /// Environment variables set by `setenv`.
297 /// Miri does not expose env vars from the host to the emulated program.
298 pub(crate) env_vars: EnvVars<'tcx>,
300 /// Program arguments (`Option` because we can only initialize them after creating the ecx).
301 /// These are *pointers* to argc/argv because macOS.
302 /// We also need the full command line as one string because of Windows.
303 pub(crate) argc: Option<MemPlace<Tag>>,
304 pub(crate) argv: Option<MemPlace<Tag>>,
305 pub(crate) cmd_line: Option<MemPlace<Tag>>,
308 pub(crate) tls: TlsData<'tcx>,
310 /// What should Miri do when an op requires communicating with the host,
311 /// such as accessing host env vars, random number generation, and
312 /// file system access.
313 pub(crate) isolated_op: IsolatedOp,
315 /// Whether to enforce the validity invariant.
316 pub(crate) validate: bool,
318 /// Whether to enforce validity (e.g., initialization) of integers and floats.
319 pub(crate) enforce_number_validity: bool,
321 /// Whether to enforce [ABI](Abi) of function calls.
322 pub(crate) enforce_abi: bool,
324 pub(crate) file_handler: shims::posix::FileHandler,
325 pub(crate) dir_handler: shims::posix::DirHandler,
327 /// The "time anchor" for this machine's monotone clock (for `Instant` simulation).
328 pub(crate) time_anchor: Instant,
330 /// The set of threads.
331 pub(crate) threads: ThreadManager<'mir, 'tcx>,
333 /// Precomputed `TyLayout`s for primitive data types that are commonly used inside Miri.
334 pub(crate) layouts: PrimitiveLayouts<'tcx>,
336 /// Allocations that are considered roots of static memory (that may leak).
337 pub(crate) static_roots: Vec<AllocId>,
339 /// The `measureme` profiler used to record timing information about
340 /// the emulated program.
341 profiler: Option<measureme::Profiler>,
342 /// Used with `profiler` to cache the `StringId`s for event names
343 /// uesd with `measureme`.
344 string_cache: FxHashMap<String, measureme::StringId>,
346 /// Cache of `Instance` exported under the given `Symbol` name.
347 /// `None` means no `Instance` exported under the given name is found.
348 pub(crate) exported_symbols_cache: FxHashMap<Symbol, Option<Instance<'tcx>>>,
350 /// Whether to raise a panic in the context of the evaluated process when unsupported
351 /// functionality is encountered. If `false`, an error is propagated in the Miri application context
352 /// instead (default behavior)
353 pub(crate) panic_on_unsupported: bool,
355 /// Equivalent setting as RUST_BACKTRACE on encountering an error.
356 pub(crate) backtrace_style: BacktraceStyle,
358 /// Crates which are considered local for the purposes of error reporting.
359 pub(crate) local_crates: Vec<CrateNum>,
362 impl<'mir, 'tcx> Evaluator<'mir, 'tcx> {
363 pub(crate) fn new(config: &MiriConfig, layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Self {
364 let local_crates = helpers::get_local_crates(&layout_cx.tcx);
366 PrimitiveLayouts::new(layout_cx).expect("Couldn't get layouts of primitive types");
367 let profiler = config.measureme_out.as_ref().map(|out| {
368 measureme::Profiler::new(out).expect("Couldn't create `measureme` profiler")
371 // `env_vars` could be initialized properly here if `Memory` were available before
372 // calling this method.
373 env_vars: EnvVars::default(),
377 tls: TlsData::default(),
378 isolated_op: config.isolated_op,
379 validate: config.validate,
380 enforce_number_validity: config.check_number_validity,
381 enforce_abi: config.check_abi,
382 file_handler: Default::default(),
383 dir_handler: Default::default(),
384 time_anchor: Instant::now(),
386 threads: ThreadManager::default(),
387 static_roots: Vec::new(),
389 string_cache: Default::default(),
390 exported_symbols_cache: FxHashMap::default(),
391 panic_on_unsupported: config.panic_on_unsupported,
392 backtrace_style: config.backtrace_style,
397 pub(crate) fn communicate(&self) -> bool {
398 self.isolated_op == IsolatedOp::Allow
401 /// Check whether the stack frame that this `FrameInfo` refers to is part of a local crate.
402 pub(crate) fn is_local(&self, frame: &FrameInfo<'_>) -> bool {
403 let def_id = frame.instance.def_id();
404 def_id.is_local() || self.local_crates.contains(&def_id.krate)
408 /// A rustc InterpCx for Miri.
409 pub type MiriEvalContext<'mir, 'tcx> = InterpCx<'mir, 'tcx, Evaluator<'mir, 'tcx>>;
411 /// A little trait that's useful to be inherited by extension traits.
412 pub trait MiriEvalContextExt<'mir, 'tcx> {
413 fn eval_context_ref<'a>(&'a self) -> &'a MiriEvalContext<'mir, 'tcx>;
414 fn eval_context_mut<'a>(&'a mut self) -> &'a mut MiriEvalContext<'mir, 'tcx>;
416 impl<'mir, 'tcx> MiriEvalContextExt<'mir, 'tcx> for MiriEvalContext<'mir, 'tcx> {
418 fn eval_context_ref(&self) -> &MiriEvalContext<'mir, 'tcx> {
422 fn eval_context_mut(&mut self) -> &mut MiriEvalContext<'mir, 'tcx> {
427 /// Machine hook implementations.
428 impl<'mir, 'tcx> Machine<'mir, 'tcx> for Evaluator<'mir, 'tcx> {
429 type MemoryKind = MiriMemoryKind;
431 type FrameExtra = FrameData<'tcx>;
432 type MemoryExtra = MemoryExtra;
433 type AllocExtra = AllocExtra;
434 type PointerTag = Tag;
435 type ExtraFnVal = Dlsym;
438 MonoHashMap<AllocId, (MemoryKind<MiriMemoryKind>, Allocation<Tag, Self::AllocExtra>)>;
440 const GLOBAL_KIND: Option<MiriMemoryKind> = Some(MiriMemoryKind::Global);
442 const PANIC_ON_ALLOC_FAIL: bool = false;
445 fn enforce_alignment(memory_extra: &MemoryExtra) -> bool {
446 memory_extra.check_alignment != AlignmentCheck::None
450 fn force_int_for_alignment_check(memory_extra: &Self::MemoryExtra) -> bool {
451 memory_extra.check_alignment == AlignmentCheck::Int
455 fn enforce_validity(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool {
460 fn enforce_number_validity(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool {
461 ecx.machine.enforce_number_validity
465 fn enforce_abi(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool {
466 ecx.machine.enforce_abi
470 fn find_mir_or_eval_fn(
471 ecx: &mut InterpCx<'mir, 'tcx, Self>,
472 instance: ty::Instance<'tcx>,
474 args: &[OpTy<'tcx, Tag>],
475 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
476 unwind: StackPopUnwind,
477 ) -> InterpResult<'tcx, Option<(&'mir mir::Body<'tcx>, ty::Instance<'tcx>)>> {
478 ecx.find_mir_or_eval_fn(instance, abi, args, ret, unwind)
483 ecx: &mut InterpCx<'mir, 'tcx, Self>,
486 args: &[OpTy<'tcx, Tag>],
487 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
488 _unwind: StackPopUnwind,
489 ) -> InterpResult<'tcx> {
490 ecx.call_dlsym(fn_val, abi, args, ret)
495 ecx: &mut rustc_const_eval::interpret::InterpCx<'mir, 'tcx, Self>,
496 instance: ty::Instance<'tcx>,
497 args: &[OpTy<'tcx, Tag>],
498 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
499 unwind: StackPopUnwind,
500 ) -> InterpResult<'tcx> {
501 ecx.call_intrinsic(instance, args, ret, unwind)
506 ecx: &mut InterpCx<'mir, 'tcx, Self>,
507 msg: &mir::AssertMessage<'tcx>,
508 unwind: Option<mir::BasicBlock>,
509 ) -> InterpResult<'tcx> {
510 ecx.assert_panic(msg, unwind)
514 fn abort(_ecx: &mut InterpCx<'mir, 'tcx, Self>, msg: String) -> InterpResult<'tcx, !> {
515 throw_machine_stop!(TerminationInfo::Abort(msg))
520 ecx: &rustc_const_eval::interpret::InterpCx<'mir, 'tcx, Self>,
522 left: &ImmTy<'tcx, Tag>,
523 right: &ImmTy<'tcx, Tag>,
524 ) -> InterpResult<'tcx, (Scalar<Tag>, bool, ty::Ty<'tcx>)> {
525 ecx.binary_ptr_op(bin_op, left, right)
528 fn thread_local_static_base_pointer(
529 ecx: &mut InterpCx<'mir, 'tcx, Self>,
531 ) -> InterpResult<'tcx, Pointer<Tag>> {
532 ecx.get_or_create_thread_local_alloc(def_id)
535 fn extern_static_base_pointer(
536 memory: &Memory<'mir, 'tcx, Self>,
538 ) -> InterpResult<'tcx, Pointer<Tag>> {
539 let attrs = memory.tcx.get_attrs(def_id);
540 let link_name = match memory.tcx.sess.first_attr_value_str_by_name(&attrs, sym::link_name) {
542 None => memory.tcx.item_name(def_id),
544 if let Some(&ptr) = memory.extra.extern_statics.get(&link_name) {
547 throw_unsup_format!("`extern` static {:?} is not supported by Miri", def_id)
551 fn init_allocation_extra<'b>(
552 mem: &Memory<'mir, 'tcx, Self>,
554 alloc: Cow<'b, Allocation>,
555 kind: Option<MemoryKind<Self::MemoryKind>>,
556 ) -> Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>> {
557 if Some(id) == mem.extra.tracked_alloc_id {
558 register_diagnostic(NonHaltingDiagnostic::CreatedAlloc(id));
561 let kind = kind.expect("we set our STATIC_KIND so this cannot be None");
562 let alloc = alloc.into_owned();
563 let stacks = if let Some(stacked_borrows) = &mem.extra.stacked_borrows {
564 Some(Stacks::new_allocation(id, alloc.size(), stacked_borrows, kind))
568 let race_alloc = if let Some(data_race) = &mem.extra.data_race {
569 Some(data_race::AllocExtra::new_allocation(&data_race, alloc.size(), kind))
573 let alloc: Allocation<Tag, Self::AllocExtra> = alloc.convert_tag_add_extra(
575 AllocExtra { stacked_borrows: stacks, data_race: race_alloc },
576 |ptr| Evaluator::tag_alloc_base_pointer(mem, ptr),
581 fn tag_alloc_base_pointer(
582 mem: &Memory<'mir, 'tcx, Self>,
583 ptr: Pointer<AllocId>,
585 let absolute_addr = intptrcast::GlobalState::rel_ptr_to_addr(&mem, ptr);
586 let sb_tag = if let Some(stacked_borrows) = &mem.extra.stacked_borrows {
587 stacked_borrows.borrow_mut().base_tag(ptr.provenance)
591 Pointer::new(Tag { alloc_id: ptr.provenance, sb: sb_tag }, Size::from_bytes(absolute_addr))
596 mem: &Memory<'mir, 'tcx, Self>,
598 ) -> Pointer<Option<Self::PointerTag>> {
599 intptrcast::GlobalState::ptr_from_addr(addr, mem)
602 /// Convert a pointer with provenance into an allocation-offset pair,
603 /// or a `None` with an absolute address if that conversion is not possible.
605 mem: &Memory<'mir, 'tcx, Self>,
606 ptr: Pointer<Self::PointerTag>,
607 ) -> (AllocId, Size) {
608 let rel = intptrcast::GlobalState::abs_ptr_to_rel(mem, ptr);
609 (ptr.provenance.alloc_id, rel)
614 memory_extra: &Self::MemoryExtra,
615 alloc_extra: &AllocExtra,
618 ) -> InterpResult<'tcx> {
619 if let Some(data_race) = &alloc_extra.data_race {
620 data_race.read(tag.alloc_id, range, memory_extra.data_race.as_ref().unwrap())?;
622 if let Some(stacked_borrows) = &alloc_extra.stacked_borrows {
623 stacked_borrows.memory_read(
627 memory_extra.stacked_borrows.as_ref().unwrap(),
636 memory_extra: &mut Self::MemoryExtra,
637 alloc_extra: &mut AllocExtra,
640 ) -> InterpResult<'tcx> {
641 if let Some(data_race) = &mut alloc_extra.data_race {
642 data_race.write(tag.alloc_id, range, memory_extra.data_race.as_mut().unwrap())?;
644 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
645 stacked_borrows.memory_written(
649 memory_extra.stacked_borrows.as_mut().unwrap(),
657 fn memory_deallocated(
658 memory_extra: &mut Self::MemoryExtra,
659 alloc_extra: &mut AllocExtra,
662 ) -> InterpResult<'tcx> {
663 if Some(tag.alloc_id) == memory_extra.tracked_alloc_id {
664 register_diagnostic(NonHaltingDiagnostic::FreedAlloc(tag.alloc_id));
666 if let Some(data_race) = &mut alloc_extra.data_race {
667 data_race.deallocate(tag.alloc_id, range, memory_extra.data_race.as_mut().unwrap())?;
669 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
670 stacked_borrows.memory_deallocated(
674 memory_extra.stacked_borrows.as_mut().unwrap(),
683 ecx: &mut InterpCx<'mir, 'tcx, Self>,
684 kind: mir::RetagKind,
685 place: &PlaceTy<'tcx, Tag>,
686 ) -> InterpResult<'tcx> {
687 if ecx.memory.extra.stacked_borrows.is_some() { ecx.retag(kind, place) } else { Ok(()) }
692 ecx: &mut InterpCx<'mir, 'tcx, Self>,
693 frame: Frame<'mir, 'tcx, Tag>,
694 ) -> InterpResult<'tcx, Frame<'mir, 'tcx, Tag, FrameData<'tcx>>> {
695 // Start recording our event before doing anything else
696 let timing = if let Some(profiler) = ecx.machine.profiler.as_ref() {
697 let fn_name = frame.instance.to_string();
698 let entry = ecx.machine.string_cache.entry(fn_name.clone());
699 let name = entry.or_insert_with(|| profiler.alloc_string(&*fn_name));
701 Some(profiler.start_recording_interval_event_detached(
703 measureme::EventId::from_label(*name),
704 ecx.get_active_thread().to_u32(),
710 let stacked_borrows = ecx.memory.extra.stacked_borrows.as_ref();
711 let call_id = stacked_borrows.map_or(NonZeroU64::new(1).unwrap(), |stacked_borrows| {
712 stacked_borrows.borrow_mut().new_call()
715 let extra = FrameData { call_id, catch_unwind: None, timing };
716 Ok(frame.with_extra(extra))
720 ecx: &'a InterpCx<'mir, 'tcx, Self>,
721 ) -> &'a [Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>] {
722 ecx.active_thread_stack()
726 ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
727 ) -> &'a mut Vec<Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>> {
728 ecx.active_thread_stack_mut()
732 fn after_stack_push(ecx: &mut InterpCx<'mir, 'tcx, Self>) -> InterpResult<'tcx> {
733 if ecx.memory.extra.stacked_borrows.is_some() { ecx.retag_return_place() } else { Ok(()) }
738 ecx: &mut InterpCx<'mir, 'tcx, Self>,
739 mut frame: Frame<'mir, 'tcx, Tag, FrameData<'tcx>>,
741 ) -> InterpResult<'tcx, StackPopJump> {
742 let timing = frame.extra.timing.take();
743 let res = ecx.handle_stack_pop(frame.extra, unwinding);
744 if let Some(profiler) = ecx.machine.profiler.as_ref() {
745 profiler.finish_recording_interval_event(timing.unwrap());