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;
11 use rand::rngs::StdRng;
12 use rand::SeedableRng;
14 use rustc_data_structures::fx::FxHashMap;
19 layout::{LayoutCx, LayoutError, TyAndLayout},
23 use rustc_span::def_id::DefId;
24 use rustc_span::symbol::{sym, Symbol};
25 use rustc_target::abi::{LayoutOf, 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 for env vars. Separate from `Machine` because we clean it up and leak-check it.
77 /// Globals copied from `tcx`.
78 /// This memory may leak.
80 /// Memory for extern statics.
81 /// This memory may leak.
83 /// Memory for thread-local statics.
84 /// This memory may leak.
88 impl Into<MemoryKind<MiriMemoryKind>> for MiriMemoryKind {
90 fn into(self) -> MemoryKind<MiriMemoryKind> {
91 MemoryKind::Machine(self)
95 impl MayLeak for MiriMemoryKind {
97 fn may_leak(self) -> bool {
98 use self::MiriMemoryKind::*;
100 Rust | C | WinHeap | Env => false,
101 Machine | Global | ExternStatic | Tls => true,
106 impl fmt::Display for MiriMemoryKind {
107 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
108 use self::MiriMemoryKind::*;
110 Rust => write!(f, "Rust heap"),
111 C => write!(f, "C heap"),
112 WinHeap => write!(f, "Windows heap"),
113 Machine => write!(f, "machine-managed memory"),
114 Env => write!(f, "environment variable"),
115 Global => write!(f, "global (static or const)"),
116 ExternStatic => write!(f, "extern static"),
117 Tls => write!(f, "thread-local static"),
122 /// Pointer provenance (tag).
123 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
125 pub alloc_id: AllocId,
126 // Stacked Borrows tag.
130 impl Provenance for Tag {
131 const OFFSET_IS_ADDR: bool = true;
133 fn fmt(ptr: &Pointer<Self>, f: &mut fmt::Formatter<'_>) -> fmt::Result {
134 let (tag, addr) = ptr.into_parts(); // address is absolute
135 write!(f, "0x{:x}", addr.bytes())?;
136 // Forward `alternate` flag to `alloc_id` printing.
138 write!(f, "[{:#?}]", tag.alloc_id)?;
140 write!(f, "[{:?}]", tag.alloc_id)?;
142 // Print Stacked Borrows tag.
143 write!(f, "{:?}", tag.sb)
146 fn get_alloc_id(self) -> AllocId {
151 /// Extra per-allocation data
152 #[derive(Debug, Clone)]
153 pub struct AllocExtra {
154 /// Stacked Borrows state is only added if it is enabled.
155 pub stacked_borrows: Option<stacked_borrows::AllocExtra>,
156 /// Data race detection via the use of a vector-clock,
157 /// this is only added if it is enabled.
158 pub data_race: Option<data_race::AllocExtra>,
161 /// Extra global memory data
163 pub struct MemoryExtra {
164 pub stacked_borrows: Option<stacked_borrows::MemoryExtra>,
165 pub data_race: Option<data_race::MemoryExtra>,
166 pub intptrcast: intptrcast::MemoryExtra,
168 /// Mapping extern static names to their base pointer.
169 extern_statics: FxHashMap<Symbol, Pointer<Tag>>,
171 /// The random number generator used for resolving non-determinism.
172 /// Needs to be queried by ptr_to_int, hence needs interior mutability.
173 pub(crate) rng: RefCell<StdRng>,
175 /// An allocation ID to report when it is being allocated
176 /// (helps for debugging memory leaks and use after free bugs).
177 tracked_alloc_id: Option<AllocId>,
179 /// Controls whether alignment of memory accesses is being checked.
180 pub(crate) check_alignment: AlignmentCheck,
182 /// Failure rate of compare_exchange_weak, between 0.0 and 1.0
183 pub(crate) cmpxchg_weak_failure_rate: f64,
187 pub fn new(config: &MiriConfig) -> Self {
188 let rng = StdRng::seed_from_u64(config.seed.unwrap_or(0));
189 let stacked_borrows = if config.stacked_borrows {
190 Some(RefCell::new(stacked_borrows::GlobalState::new(
191 config.tracked_pointer_tag,
192 config.tracked_call_id,
199 if config.data_race_detector { Some(data_race::GlobalState::new()) } else { None };
203 intptrcast: Default::default(),
204 extern_statics: FxHashMap::default(),
205 rng: RefCell::new(rng),
206 tracked_alloc_id: config.tracked_alloc_id,
207 check_alignment: config.check_alignment,
208 cmpxchg_weak_failure_rate: config.cmpxchg_weak_failure_rate,
212 fn add_extern_static<'tcx, 'mir>(
213 this: &mut MiriEvalContext<'mir, 'tcx>,
215 ptr: Pointer<Option<Tag>>,
217 let ptr = ptr.into_pointer_or_addr().unwrap();
218 this.memory.extra.extern_statics.try_insert(Symbol::intern(name), ptr).unwrap();
221 /// Sets up the "extern statics" for this machine.
222 pub fn init_extern_statics<'tcx, 'mir>(
223 this: &mut MiriEvalContext<'mir, 'tcx>,
224 ) -> InterpResult<'tcx> {
225 match this.tcx.sess.target.os.as_str() {
227 // "__cxa_thread_atexit_impl"
228 // This should be all-zero, pointer-sized.
229 let layout = this.machine.layouts.usize;
230 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
231 this.write_scalar(Scalar::from_machine_usize(0, this), &place.into())?;
232 Self::add_extern_static(this, "__cxa_thread_atexit_impl", place.ptr);
234 Self::add_extern_static(
237 this.machine.env_vars.environ.unwrap().ptr,
242 // This is some obscure hack that is part of the Windows TLS story. It's a `u8`.
243 let layout = this.machine.layouts.u8;
244 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
245 this.write_scalar(Scalar::from_u8(0), &place.into())?;
246 Self::add_extern_static(this, "_tls_used", place.ptr);
248 _ => {} // No "extern statics" supported on this target
254 /// Precomputed layouts of primitive types
255 pub struct PrimitiveLayouts<'tcx> {
256 pub unit: TyAndLayout<'tcx>,
257 pub i8: TyAndLayout<'tcx>,
258 pub i32: TyAndLayout<'tcx>,
259 pub isize: TyAndLayout<'tcx>,
260 pub u8: TyAndLayout<'tcx>,
261 pub u32: TyAndLayout<'tcx>,
262 pub usize: TyAndLayout<'tcx>,
265 impl<'mir, 'tcx: 'mir> PrimitiveLayouts<'tcx> {
266 fn new(layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Result<Self, LayoutError<'tcx>> {
268 unit: layout_cx.layout_of(layout_cx.tcx.mk_unit())?,
269 i8: layout_cx.layout_of(layout_cx.tcx.types.i8)?,
270 i32: layout_cx.layout_of(layout_cx.tcx.types.i32)?,
271 isize: layout_cx.layout_of(layout_cx.tcx.types.isize)?,
272 u8: layout_cx.layout_of(layout_cx.tcx.types.u8)?,
273 u32: layout_cx.layout_of(layout_cx.tcx.types.u32)?,
274 usize: layout_cx.layout_of(layout_cx.tcx.types.usize)?,
279 /// The machine itself.
280 pub struct Evaluator<'mir, 'tcx> {
281 /// Environment variables set by `setenv`.
282 /// Miri does not expose env vars from the host to the emulated program.
283 pub(crate) env_vars: EnvVars<'tcx>,
285 /// Program arguments (`Option` because we can only initialize them after creating the ecx).
286 /// These are *pointers* to argc/argv because macOS.
287 /// We also need the full command line as one string because of Windows.
288 pub(crate) argc: Option<MemPlace<Tag>>,
289 pub(crate) argv: Option<MemPlace<Tag>>,
290 pub(crate) cmd_line: Option<MemPlace<Tag>>,
293 pub(crate) tls: TlsData<'tcx>,
295 /// What should Miri do when an op requires communicating with the host,
296 /// such as accessing host env vars, random number generation, and
297 /// file system access.
298 pub(crate) isolated_op: IsolatedOp,
300 /// Whether to enforce the validity invariant.
301 pub(crate) validate: bool,
303 /// Whether to enforce [ABI](Abi) of function calls.
304 pub(crate) enforce_abi: bool,
306 pub(crate) file_handler: shims::posix::FileHandler,
307 pub(crate) dir_handler: shims::posix::DirHandler,
309 /// The "time anchor" for this machine's monotone clock (for `Instant` simulation).
310 pub(crate) time_anchor: Instant,
312 /// The set of threads.
313 pub(crate) threads: ThreadManager<'mir, 'tcx>,
315 /// Precomputed `TyLayout`s for primitive data types that are commonly used inside Miri.
316 pub(crate) layouts: PrimitiveLayouts<'tcx>,
318 /// Allocations that are considered roots of static memory (that may leak).
319 pub(crate) static_roots: Vec<AllocId>,
321 /// The `measureme` profiler used to record timing information about
322 /// the emulated program.
323 profiler: Option<measureme::Profiler>,
324 /// Used with `profiler` to cache the `StringId`s for event names
325 /// uesd with `measureme`.
326 string_cache: FxHashMap<String, measureme::StringId>,
328 /// Cache of `Instance` exported under the given `Symbol` name.
329 /// `None` means no `Instance` exported under the given name is found.
330 pub(crate) exported_symbols_cache: FxHashMap<Symbol, Option<Instance<'tcx>>>,
332 /// Whether to raise a panic in the context of the evaluated process when unsupported
333 /// functionality is encountered. If `false`, an error is propagated in the Miri application context
334 /// instead (default behavior)
335 pub(crate) panic_on_unsupported: bool,
338 impl<'mir, 'tcx> Evaluator<'mir, 'tcx> {
339 pub(crate) fn new(config: &MiriConfig, layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Self {
341 PrimitiveLayouts::new(layout_cx).expect("Couldn't get layouts of primitive types");
342 let profiler = config.measureme_out.as_ref().map(|out| {
343 measureme::Profiler::new(out).expect("Couldn't create `measureme` profiler")
346 // `env_vars` could be initialized properly here if `Memory` were available before
347 // calling this method.
348 env_vars: EnvVars::default(),
352 tls: TlsData::default(),
353 isolated_op: config.isolated_op,
354 validate: config.validate,
355 enforce_abi: config.check_abi,
356 file_handler: Default::default(),
357 dir_handler: Default::default(),
358 time_anchor: Instant::now(),
360 threads: ThreadManager::default(),
361 static_roots: Vec::new(),
363 string_cache: Default::default(),
364 exported_symbols_cache: FxHashMap::default(),
365 panic_on_unsupported: config.panic_on_unsupported,
369 pub(crate) fn communicate(&self) -> bool {
370 self.isolated_op == IsolatedOp::Allow
374 /// A rustc InterpCx for Miri.
375 pub type MiriEvalContext<'mir, 'tcx> = InterpCx<'mir, 'tcx, Evaluator<'mir, 'tcx>>;
377 /// A little trait that's useful to be inherited by extension traits.
378 pub trait MiriEvalContextExt<'mir, 'tcx> {
379 fn eval_context_ref<'a>(&'a self) -> &'a MiriEvalContext<'mir, 'tcx>;
380 fn eval_context_mut<'a>(&'a mut self) -> &'a mut MiriEvalContext<'mir, 'tcx>;
382 impl<'mir, 'tcx> MiriEvalContextExt<'mir, 'tcx> for MiriEvalContext<'mir, 'tcx> {
384 fn eval_context_ref(&self) -> &MiriEvalContext<'mir, 'tcx> {
388 fn eval_context_mut(&mut self) -> &mut MiriEvalContext<'mir, 'tcx> {
393 /// Machine hook implementations.
394 impl<'mir, 'tcx> Machine<'mir, 'tcx> for Evaluator<'mir, 'tcx> {
395 type MemoryKind = MiriMemoryKind;
397 type FrameExtra = FrameData<'tcx>;
398 type MemoryExtra = MemoryExtra;
399 type AllocExtra = AllocExtra;
400 type PointerTag = Tag;
401 type ExtraFnVal = Dlsym;
404 MonoHashMap<AllocId, (MemoryKind<MiriMemoryKind>, Allocation<Tag, Self::AllocExtra>)>;
406 const GLOBAL_KIND: Option<MiriMemoryKind> = Some(MiriMemoryKind::Global);
408 const PANIC_ON_ALLOC_FAIL: bool = false;
411 fn enforce_alignment(memory_extra: &MemoryExtra) -> bool {
412 memory_extra.check_alignment != AlignmentCheck::None
416 fn force_int_for_alignment_check(memory_extra: &Self::MemoryExtra) -> bool {
417 memory_extra.check_alignment == AlignmentCheck::Int
421 fn enforce_validity(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool {
426 fn enforce_abi(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool {
427 ecx.machine.enforce_abi
431 fn find_mir_or_eval_fn(
432 ecx: &mut InterpCx<'mir, 'tcx, Self>,
433 instance: ty::Instance<'tcx>,
435 args: &[OpTy<'tcx, Tag>],
436 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
437 unwind: StackPopUnwind,
438 ) -> InterpResult<'tcx, Option<&'mir mir::Body<'tcx>>> {
439 ecx.find_mir_or_eval_fn(instance, abi, args, ret, unwind)
444 ecx: &mut InterpCx<'mir, 'tcx, Self>,
447 args: &[OpTy<'tcx, Tag>],
448 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
449 _unwind: StackPopUnwind,
450 ) -> InterpResult<'tcx> {
451 ecx.call_dlsym(fn_val, abi, args, ret)
456 ecx: &mut rustc_mir::interpret::InterpCx<'mir, 'tcx, Self>,
457 instance: ty::Instance<'tcx>,
458 args: &[OpTy<'tcx, Tag>],
459 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
460 unwind: StackPopUnwind,
461 ) -> InterpResult<'tcx> {
462 ecx.call_intrinsic(instance, args, ret, unwind)
467 ecx: &mut InterpCx<'mir, 'tcx, Self>,
468 msg: &mir::AssertMessage<'tcx>,
469 unwind: Option<mir::BasicBlock>,
470 ) -> InterpResult<'tcx> {
471 ecx.assert_panic(msg, unwind)
475 fn abort(_ecx: &mut InterpCx<'mir, 'tcx, Self>, msg: String) -> InterpResult<'tcx, !> {
476 throw_machine_stop!(TerminationInfo::Abort(msg))
481 ecx: &rustc_mir::interpret::InterpCx<'mir, 'tcx, Self>,
483 left: &ImmTy<'tcx, Tag>,
484 right: &ImmTy<'tcx, Tag>,
485 ) -> InterpResult<'tcx, (Scalar<Tag>, bool, ty::Ty<'tcx>)> {
486 ecx.binary_ptr_op(bin_op, left, right)
490 ecx: &mut InterpCx<'mir, 'tcx, Self>,
491 dest: &PlaceTy<'tcx, Tag>,
492 ) -> InterpResult<'tcx> {
493 trace!("box_alloc for {:?}", dest.layout.ty);
494 let layout = ecx.layout_of(dest.layout.ty.builtin_deref(false).unwrap().ty)?;
495 // First argument: `size`.
496 // (`0` is allowed here -- this is expected to be handled by the lang item).
497 let size = Scalar::from_machine_usize(layout.size.bytes(), ecx);
499 // Second argument: `align`.
500 let align = Scalar::from_machine_usize(layout.align.abi.bytes(), ecx);
502 // Call the `exchange_malloc` lang item.
503 let malloc = ecx.tcx.lang_items().exchange_malloc_fn().unwrap();
504 let malloc = ty::Instance::mono(ecx.tcx.tcx, malloc);
508 &[size.into(), align.into()],
510 // Don't do anything when we are done. The `statement()` function will increment
511 // the old stack frame's stmt counter to the next statement, which means that when
512 // `exchange_malloc` returns, we go on evaluating exactly where we want to be.
513 StackPopCleanup::None { cleanup: true },
518 fn thread_local_static_base_pointer(
519 ecx: &mut InterpCx<'mir, 'tcx, Self>,
521 ) -> InterpResult<'tcx, Pointer<Tag>> {
522 ecx.get_or_create_thread_local_alloc(def_id)
525 fn extern_static_base_pointer(
526 memory: &Memory<'mir, 'tcx, Self>,
528 ) -> InterpResult<'tcx, Pointer<Tag>> {
529 let attrs = memory.tcx.get_attrs(def_id);
530 let link_name = match memory.tcx.sess.first_attr_value_str_by_name(&attrs, sym::link_name) {
532 None => memory.tcx.item_name(def_id),
534 if let Some(&ptr) = memory.extra.extern_statics.get(&link_name) {
537 throw_unsup_format!("`extern` static {:?} is not supported by Miri", def_id)
541 fn init_allocation_extra<'b>(
542 mem: &Memory<'mir, 'tcx, Self>,
544 alloc: Cow<'b, Allocation>,
545 kind: Option<MemoryKind<Self::MemoryKind>>,
546 ) -> Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>> {
547 if Some(id) == mem.extra.tracked_alloc_id {
548 register_diagnostic(NonHaltingDiagnostic::CreatedAlloc(id));
551 let kind = kind.expect("we set our STATIC_KIND so this cannot be None");
552 let alloc = alloc.into_owned();
553 let stacks = if let Some(stacked_borrows) = &mem.extra.stacked_borrows {
554 Some(Stacks::new_allocation(id, alloc.size(), stacked_borrows, kind))
558 let race_alloc = if let Some(data_race) = &mem.extra.data_race {
559 Some(data_race::AllocExtra::new_allocation(&data_race, alloc.size(), kind))
563 let alloc: Allocation<Tag, Self::AllocExtra> = alloc.convert_tag_add_extra(
565 AllocExtra { stacked_borrows: stacks, data_race: race_alloc },
566 |ptr| Evaluator::tag_alloc_base_pointer(mem, ptr),
571 fn tag_alloc_base_pointer(
572 mem: &Memory<'mir, 'tcx, Self>,
573 ptr: Pointer<AllocId>,
575 let absolute_addr = intptrcast::GlobalState::rel_ptr_to_addr(&mem, ptr);
576 let sb_tag = if let Some(stacked_borrows) = &mem.extra.stacked_borrows {
577 stacked_borrows.borrow_mut().base_tag(ptr.provenance)
581 Pointer::new(Tag { alloc_id: ptr.provenance, sb: sb_tag }, Size::from_bytes(absolute_addr))
586 mem: &Memory<'mir, 'tcx, Self>,
588 ) -> Pointer<Option<Self::PointerTag>> {
589 intptrcast::GlobalState::ptr_from_addr(addr, mem)
592 /// Convert a pointer with provenance into an allocation-offset pair,
593 /// or a `None` with an absolute address if that conversion is not possible.
595 mem: &Memory<'mir, 'tcx, Self>,
596 ptr: Pointer<Self::PointerTag>,
597 ) -> (AllocId, Size) {
598 let rel = intptrcast::GlobalState::abs_ptr_to_rel(mem, ptr);
599 (ptr.provenance.alloc_id, rel)
604 memory_extra: &Self::MemoryExtra,
605 alloc_extra: &AllocExtra,
608 ) -> InterpResult<'tcx> {
609 if let Some(data_race) = &alloc_extra.data_race {
610 data_race.read(tag.alloc_id, range, memory_extra.data_race.as_ref().unwrap())?;
612 if let Some(stacked_borrows) = &alloc_extra.stacked_borrows {
613 stacked_borrows.memory_read(
617 memory_extra.stacked_borrows.as_ref().unwrap(),
626 memory_extra: &mut Self::MemoryExtra,
627 alloc_extra: &mut AllocExtra,
630 ) -> InterpResult<'tcx> {
631 if let Some(data_race) = &mut alloc_extra.data_race {
632 data_race.write(tag.alloc_id, range, memory_extra.data_race.as_mut().unwrap())?;
634 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
635 stacked_borrows.memory_written(
639 memory_extra.stacked_borrows.as_mut().unwrap(),
647 fn memory_deallocated(
648 memory_extra: &mut Self::MemoryExtra,
649 alloc_extra: &mut AllocExtra,
652 ) -> InterpResult<'tcx> {
653 if Some(tag.alloc_id) == memory_extra.tracked_alloc_id {
654 register_diagnostic(NonHaltingDiagnostic::FreedAlloc(tag.alloc_id));
656 if let Some(data_race) = &mut alloc_extra.data_race {
657 data_race.deallocate(tag.alloc_id, range, memory_extra.data_race.as_mut().unwrap())?;
659 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
660 stacked_borrows.memory_deallocated(
664 memory_extra.stacked_borrows.as_mut().unwrap(),
673 ecx: &mut InterpCx<'mir, 'tcx, Self>,
674 kind: mir::RetagKind,
675 place: &PlaceTy<'tcx, Tag>,
676 ) -> InterpResult<'tcx> {
677 if ecx.memory.extra.stacked_borrows.is_some() { ecx.retag(kind, place) } else { Ok(()) }
682 ecx: &mut InterpCx<'mir, 'tcx, Self>,
683 frame: Frame<'mir, 'tcx, Tag>,
684 ) -> InterpResult<'tcx, Frame<'mir, 'tcx, Tag, FrameData<'tcx>>> {
685 // Start recording our event before doing anything else
686 let timing = if let Some(profiler) = ecx.machine.profiler.as_ref() {
687 let fn_name = frame.instance.to_string();
688 let entry = ecx.machine.string_cache.entry(fn_name.clone());
689 let name = entry.or_insert_with(|| profiler.alloc_string(&*fn_name));
691 Some(profiler.start_recording_interval_event_detached(
693 measureme::EventId::from_label(*name),
694 ecx.get_active_thread().to_u32(),
700 let stacked_borrows = ecx.memory.extra.stacked_borrows.as_ref();
701 let call_id = stacked_borrows.map_or(NonZeroU64::new(1).unwrap(), |stacked_borrows| {
702 stacked_borrows.borrow_mut().new_call()
705 let extra = FrameData { call_id, catch_unwind: None, timing };
706 Ok(frame.with_extra(extra))
710 ecx: &'a InterpCx<'mir, 'tcx, Self>,
711 ) -> &'a [Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>] {
712 ecx.active_thread_stack()
716 ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
717 ) -> &'a mut Vec<Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>> {
718 ecx.active_thread_stack_mut()
722 fn after_stack_push(ecx: &mut InterpCx<'mir, 'tcx, Self>) -> InterpResult<'tcx> {
723 if ecx.memory.extra.stacked_borrows.is_some() { ecx.retag_return_place() } else { Ok(()) }
728 ecx: &mut InterpCx<'mir, 'tcx, Self>,
729 mut frame: Frame<'mir, 'tcx, Tag, FrameData<'tcx>>,
731 ) -> InterpResult<'tcx, StackPopJump> {
732 let timing = frame.extra.timing.take();
733 let res = ecx.handle_stack_pop(frame.extra, unwinding);
734 if let Some(profiler) = ecx.machine.profiler.as_ref() {
735 profiler.finish_recording_interval_event(timing.unwrap());