1 //! Global machine state as well as implementation of the interpreter engine
5 use std::cell::RefCell;
6 use std::collections::HashSet;
8 use std::num::NonZeroU64;
10 use std::time::Instant;
12 use rand::rngs::StdRng;
13 use rand::SeedableRng;
15 use rustc_ast::ast::Mutability;
16 use rustc_data_structures::fx::FxHashMap;
18 use rustc_data_structures::static_assert_size;
23 layout::{LayoutCx, LayoutError, LayoutOf, TyAndLayout},
24 Instance, TyCtxt, TypeAndMut,
27 use rustc_span::def_id::{CrateNum, DefId};
28 use rustc_span::Symbol;
29 use rustc_target::abi::Size;
30 use rustc_target::spec::abi::Abi;
32 use crate::{shims::posix::FileHandler, *};
34 // Some global facts about the emulated machine.
35 pub const PAGE_SIZE: u64 = 4 * 1024; // FIXME: adjust to target architecture
36 pub const STACK_ADDR: u64 = 32 * PAGE_SIZE; // not really about the "stack", but where we start assigning integer addresses to allocations
37 pub const STACK_SIZE: u64 = 16 * PAGE_SIZE; // whatever
38 pub const NUM_CPUS: u64 = 1;
40 /// Extra data stored with each stack frame
41 pub struct FrameData<'tcx> {
42 /// Extra data for Stacked Borrows.
43 pub call_id: stacked_borrows::CallId,
45 /// If this is Some(), then this is a special "catch unwind" frame (the frame of `try_fn`
46 /// called by `try`). When this frame is popped during unwinding a panic,
47 /// we stop unwinding, use the `CatchUnwindData` to handle catching.
48 pub catch_unwind: Option<CatchUnwindData<'tcx>>,
50 /// If `measureme` profiling is enabled, holds timing information
51 /// for the start of this frame. When we finish executing this frame,
52 /// we use this to register a completed event with `measureme`.
53 pub timing: Option<measureme::DetachedTiming>,
56 impl<'tcx> std::fmt::Debug for FrameData<'tcx> {
57 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
58 // Omitting `timing`, it does not support `Debug`.
59 let FrameData { call_id, catch_unwind, timing: _ } = self;
60 f.debug_struct("FrameData")
61 .field("call_id", call_id)
62 .field("catch_unwind", catch_unwind)
67 /// Extra memory kinds
68 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
69 pub enum MiriMemoryKind {
70 /// `__rust_alloc` memory.
74 /// Windows `HeapAlloc` memory.
76 /// Memory for args, errno, and other parts of the machine-managed environment.
77 /// This memory may leak.
79 /// Memory allocated by the runtime (e.g. env vars). Separate from `Machine`
80 /// because we clean it up and leak-check it.
82 /// Globals copied from `tcx`.
83 /// This memory may leak.
85 /// Memory for extern statics.
86 /// This memory may leak.
88 /// Memory for thread-local statics.
89 /// This memory may leak.
93 impl Into<MemoryKind<MiriMemoryKind>> for MiriMemoryKind {
95 fn into(self) -> MemoryKind<MiriMemoryKind> {
96 MemoryKind::Machine(self)
100 impl MayLeak for MiriMemoryKind {
102 fn may_leak(self) -> bool {
103 use self::MiriMemoryKind::*;
105 Rust | C | WinHeap | Runtime => false,
106 Machine | Global | ExternStatic | Tls => true,
111 impl fmt::Display for MiriMemoryKind {
112 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
113 use self::MiriMemoryKind::*;
115 Rust => write!(f, "Rust heap"),
116 C => write!(f, "C heap"),
117 WinHeap => write!(f, "Windows heap"),
118 Machine => write!(f, "machine-managed memory"),
119 Runtime => write!(f, "language runtime memory"),
120 Global => write!(f, "global (static or const)"),
121 ExternStatic => write!(f, "extern static"),
122 Tls => write!(f, "thread-local static"),
127 /// Pointer provenance (tag).
128 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
130 pub alloc_id: AllocId,
131 /// Stacked Borrows tag.
135 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
136 static_assert_size!(Pointer<Tag>, 24);
137 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
138 static_assert_size!(Pointer<Option<Tag>>, 24);
139 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
140 static_assert_size!(ScalarMaybeUninit<Tag>, 32);
142 impl Provenance for Tag {
143 /// We use absolute addresses in the `offset` of a `Pointer<Tag>`.
144 const OFFSET_IS_ADDR: bool = true;
146 /// We cannot err on partial overwrites, it happens too often in practice (due to unions).
147 const ERR_ON_PARTIAL_PTR_OVERWRITE: bool = false;
149 fn fmt(ptr: &Pointer<Self>, f: &mut fmt::Formatter<'_>) -> fmt::Result {
150 let (tag, addr) = ptr.into_parts(); // address is absolute
151 write!(f, "0x{:x}", addr.bytes())?;
152 // Forward `alternate` flag to `alloc_id` printing.
154 write!(f, "[{:#?}]", tag.alloc_id)?;
156 write!(f, "[{:?}]", tag.alloc_id)?;
158 // Print Stacked Borrows tag.
159 write!(f, "{:?}", tag.sb)
162 fn get_alloc_id(self) -> Option<AllocId> {
167 /// Extra per-allocation data
168 #[derive(Debug, Clone)]
169 pub struct AllocExtra {
170 /// Stacked Borrows state is only added if it is enabled.
171 pub stacked_borrows: Option<stacked_borrows::AllocExtra>,
172 /// Data race detection via the use of a vector-clock,
173 /// this is only added if it is enabled.
174 pub data_race: Option<data_race::AllocExtra>,
177 /// Precomputed layouts of primitive types
178 pub struct PrimitiveLayouts<'tcx> {
179 pub unit: TyAndLayout<'tcx>,
180 pub i8: TyAndLayout<'tcx>,
181 pub i32: TyAndLayout<'tcx>,
182 pub isize: TyAndLayout<'tcx>,
183 pub u8: TyAndLayout<'tcx>,
184 pub u32: TyAndLayout<'tcx>,
185 pub usize: TyAndLayout<'tcx>,
186 pub bool: TyAndLayout<'tcx>,
187 pub mut_raw_ptr: TyAndLayout<'tcx>,
190 impl<'mir, 'tcx: 'mir> PrimitiveLayouts<'tcx> {
191 fn new(layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Result<Self, LayoutError<'tcx>> {
192 let tcx = layout_cx.tcx;
193 let mut_raw_ptr = tcx.mk_ptr(TypeAndMut { ty: tcx.types.unit, mutbl: Mutability::Mut });
195 unit: layout_cx.layout_of(tcx.mk_unit())?,
196 i8: layout_cx.layout_of(tcx.types.i8)?,
197 i32: layout_cx.layout_of(tcx.types.i32)?,
198 isize: layout_cx.layout_of(tcx.types.isize)?,
199 u8: layout_cx.layout_of(tcx.types.u8)?,
200 u32: layout_cx.layout_of(tcx.types.u32)?,
201 usize: layout_cx.layout_of(tcx.types.usize)?,
202 bool: layout_cx.layout_of(tcx.types.bool)?,
203 mut_raw_ptr: layout_cx.layout_of(mut_raw_ptr)?,
208 /// The machine itself.
209 pub struct Evaluator<'mir, 'tcx> {
210 pub stacked_borrows: Option<stacked_borrows::GlobalState>,
211 pub data_race: Option<data_race::GlobalState>,
212 pub intptrcast: intptrcast::GlobalState,
214 /// Environment variables set by `setenv`.
215 /// Miri does not expose env vars from the host to the emulated program.
216 pub(crate) env_vars: EnvVars<'tcx>,
218 /// Program arguments (`Option` because we can only initialize them after creating the ecx).
219 /// These are *pointers* to argc/argv because macOS.
220 /// We also need the full command line as one string because of Windows.
221 pub(crate) argc: Option<MemPlace<Tag>>,
222 pub(crate) argv: Option<MemPlace<Tag>>,
223 pub(crate) cmd_line: Option<MemPlace<Tag>>,
226 pub(crate) tls: TlsData<'tcx>,
228 /// What should Miri do when an op requires communicating with the host,
229 /// such as accessing host env vars, random number generation, and
230 /// file system access.
231 pub(crate) isolated_op: IsolatedOp,
233 /// Whether to enforce the validity invariant.
234 pub(crate) validate: bool,
236 /// Whether to enforce validity (e.g., initialization) of integers and floats.
237 pub(crate) enforce_number_validity: bool,
239 /// Whether to enforce [ABI](Abi) of function calls.
240 pub(crate) enforce_abi: bool,
242 pub(crate) file_handler: shims::posix::FileHandler,
243 pub(crate) dir_handler: shims::posix::DirHandler,
245 /// The "time anchor" for this machine's monotone clock (for `Instant` simulation).
246 pub(crate) time_anchor: Instant,
248 /// The set of threads.
249 pub(crate) threads: ThreadManager<'mir, 'tcx>,
251 /// Precomputed `TyLayout`s for primitive data types that are commonly used inside Miri.
252 pub(crate) layouts: PrimitiveLayouts<'tcx>,
254 /// Allocations that are considered roots of static memory (that may leak).
255 pub(crate) static_roots: Vec<AllocId>,
257 /// The `measureme` profiler used to record timing information about
258 /// the emulated program.
259 profiler: Option<measureme::Profiler>,
260 /// Used with `profiler` to cache the `StringId`s for event names
261 /// uesd with `measureme`.
262 string_cache: FxHashMap<String, measureme::StringId>,
264 /// Cache of `Instance` exported under the given `Symbol` name.
265 /// `None` means no `Instance` exported under the given name is found.
266 pub(crate) exported_symbols_cache: FxHashMap<Symbol, Option<Instance<'tcx>>>,
268 /// Whether to raise a panic in the context of the evaluated process when unsupported
269 /// functionality is encountered. If `false`, an error is propagated in the Miri application context
270 /// instead (default behavior)
271 pub(crate) panic_on_unsupported: bool,
273 /// Equivalent setting as RUST_BACKTRACE on encountering an error.
274 pub(crate) backtrace_style: BacktraceStyle,
276 /// Crates which are considered local for the purposes of error reporting.
277 pub(crate) local_crates: Rc<[CrateNum]>,
279 /// Mapping extern static names to their base pointer.
280 extern_statics: FxHashMap<Symbol, Pointer<Tag>>,
282 /// The random number generator used for resolving non-determinism.
283 /// Needs to be queried by ptr_to_int, hence needs interior mutability.
284 pub(crate) rng: RefCell<StdRng>,
286 /// The allocation IDs to report when they are being allocated
287 /// (helps for debugging memory leaks and use after free bugs).
288 tracked_alloc_ids: HashSet<AllocId>,
290 /// Controls whether alignment of memory accesses is being checked.
291 pub(crate) check_alignment: AlignmentCheck,
293 /// Failure rate of compare_exchange_weak, between 0.0 and 1.0
294 pub(crate) cmpxchg_weak_failure_rate: f64,
296 /// Corresponds to -Zmiri-mute-stdout-stderr and doesn't write the output but acts as if it succeeded.
297 pub(crate) mute_stdout_stderr: bool,
300 impl<'mir, 'tcx> Evaluator<'mir, 'tcx> {
301 pub(crate) fn new(config: &MiriConfig, layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Self {
302 let local_crates = helpers::get_local_crates(&layout_cx.tcx);
304 PrimitiveLayouts::new(layout_cx).expect("Couldn't get layouts of primitive types");
305 let profiler = config.measureme_out.as_ref().map(|out| {
306 measureme::Profiler::new(out).expect("Couldn't create `measureme` profiler")
308 let rng = StdRng::seed_from_u64(config.seed.unwrap_or(0));
309 let stacked_borrows = if config.stacked_borrows {
310 Some(RefCell::new(stacked_borrows::GlobalStateInner::new(
311 config.tracked_pointer_tags.clone(),
312 config.tracked_call_ids.clone(),
319 if config.data_race_detector { Some(data_race::GlobalState::new()) } else { None };
323 intptrcast: RefCell::new(intptrcast::GlobalStateInner::new(config)),
324 // `env_vars` depends on a full interpreter so we cannot properly initialize it yet.
325 env_vars: EnvVars::default(),
329 tls: TlsData::default(),
330 isolated_op: config.isolated_op,
331 validate: config.validate,
332 enforce_number_validity: config.check_number_validity,
333 enforce_abi: config.check_abi,
334 file_handler: FileHandler::new(config.mute_stdout_stderr),
335 dir_handler: Default::default(),
336 time_anchor: Instant::now(),
338 threads: ThreadManager::default(),
339 static_roots: Vec::new(),
341 string_cache: Default::default(),
342 exported_symbols_cache: FxHashMap::default(),
343 panic_on_unsupported: config.panic_on_unsupported,
344 backtrace_style: config.backtrace_style,
346 extern_statics: FxHashMap::default(),
347 rng: RefCell::new(rng),
348 tracked_alloc_ids: config.tracked_alloc_ids.clone(),
349 check_alignment: config.check_alignment,
350 cmpxchg_weak_failure_rate: config.cmpxchg_weak_failure_rate,
351 mute_stdout_stderr: config.mute_stdout_stderr,
355 pub(crate) fn late_init(
356 this: &mut MiriEvalContext<'mir, 'tcx>,
358 ) -> InterpResult<'tcx> {
359 EnvVars::init(this, config)?;
360 Evaluator::init_extern_statics(this)?;
364 fn add_extern_static(
365 this: &mut MiriEvalContext<'mir, 'tcx>,
367 ptr: Pointer<Option<Tag>>,
369 // This got just allocated, so there definitely is a pointer here.
370 let ptr = ptr.into_pointer_or_addr().unwrap();
371 this.machine.extern_statics.try_insert(Symbol::intern(name), ptr).unwrap();
374 /// Sets up the "extern statics" for this machine.
375 fn init_extern_statics(this: &mut MiriEvalContext<'mir, 'tcx>) -> InterpResult<'tcx> {
376 match this.tcx.sess.target.os.as_ref() {
379 Self::add_extern_static(
382 this.machine.env_vars.environ.unwrap().ptr,
384 // A couple zero-initialized pointer-sized extern statics.
385 // Most of them are for weak symbols, which we all set to null (indicating that the
386 // symbol is not supported, and triggering fallback code which ends up calling a
387 // syscall that we do support).
388 for name in &["__cxa_thread_atexit_impl", "getrandom", "statx", "__clock_gettime64"]
390 let layout = this.machine.layouts.usize;
391 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
392 this.write_scalar(Scalar::from_machine_usize(0, this), &place.into())?;
393 Self::add_extern_static(this, name, place.ptr);
398 // This is some obscure hack that is part of the Windows TLS story. It's a `u8`.
399 let layout = this.machine.layouts.u8;
400 let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
401 this.write_scalar(Scalar::from_u8(0), &place.into())?;
402 Self::add_extern_static(this, "_tls_used", place.ptr);
404 _ => {} // No "extern statics" supported on this target
409 pub(crate) fn communicate(&self) -> bool {
410 self.isolated_op == IsolatedOp::Allow
413 /// Check whether the stack frame that this `FrameInfo` refers to is part of a local crate.
414 pub(crate) fn is_local(&self, frame: &FrameInfo<'_>) -> bool {
415 let def_id = frame.instance.def_id();
416 def_id.is_local() || self.local_crates.contains(&def_id.krate)
420 /// A rustc InterpCx for Miri.
421 pub type MiriEvalContext<'mir, 'tcx> = InterpCx<'mir, 'tcx, Evaluator<'mir, 'tcx>>;
423 /// A little trait that's useful to be inherited by extension traits.
424 pub trait MiriEvalContextExt<'mir, 'tcx> {
425 fn eval_context_ref<'a>(&'a self) -> &'a MiriEvalContext<'mir, 'tcx>;
426 fn eval_context_mut<'a>(&'a mut self) -> &'a mut MiriEvalContext<'mir, 'tcx>;
428 impl<'mir, 'tcx> MiriEvalContextExt<'mir, 'tcx> for MiriEvalContext<'mir, 'tcx> {
430 fn eval_context_ref(&self) -> &MiriEvalContext<'mir, 'tcx> {
434 fn eval_context_mut(&mut self) -> &mut MiriEvalContext<'mir, 'tcx> {
439 /// Machine hook implementations.
440 impl<'mir, 'tcx> Machine<'mir, 'tcx> for Evaluator<'mir, 'tcx> {
441 type MemoryKind = MiriMemoryKind;
442 type ExtraFnVal = Dlsym;
444 type FrameExtra = FrameData<'tcx>;
445 type AllocExtra = AllocExtra;
447 type PointerTag = Tag;
448 type TagExtra = SbTag;
451 MonoHashMap<AllocId, (MemoryKind<MiriMemoryKind>, Allocation<Tag, Self::AllocExtra>)>;
453 const GLOBAL_KIND: Option<MiriMemoryKind> = Some(MiriMemoryKind::Global);
455 const PANIC_ON_ALLOC_FAIL: bool = false;
458 fn enforce_alignment(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
459 ecx.machine.check_alignment != AlignmentCheck::None
463 fn force_int_for_alignment_check(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
464 ecx.machine.check_alignment == AlignmentCheck::Int
468 fn enforce_validity(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
473 fn enforce_number_init(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
474 ecx.machine.enforce_number_validity
478 fn enforce_number_no_provenance(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
479 ecx.machine.enforce_number_validity
483 fn enforce_abi(ecx: &MiriEvalContext<'mir, 'tcx>) -> bool {
484 ecx.machine.enforce_abi
488 fn find_mir_or_eval_fn(
489 ecx: &mut MiriEvalContext<'mir, 'tcx>,
490 instance: ty::Instance<'tcx>,
492 args: &[OpTy<'tcx, Tag>],
493 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
494 unwind: StackPopUnwind,
495 ) -> InterpResult<'tcx, Option<(&'mir mir::Body<'tcx>, ty::Instance<'tcx>)>> {
496 ecx.find_mir_or_eval_fn(instance, abi, args, ret, unwind)
501 ecx: &mut MiriEvalContext<'mir, 'tcx>,
504 args: &[OpTy<'tcx, Tag>],
505 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
506 _unwind: StackPopUnwind,
507 ) -> InterpResult<'tcx> {
508 ecx.call_dlsym(fn_val, abi, args, ret)
513 ecx: &mut MiriEvalContext<'mir, 'tcx>,
514 instance: ty::Instance<'tcx>,
515 args: &[OpTy<'tcx, Tag>],
516 ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
517 unwind: StackPopUnwind,
518 ) -> InterpResult<'tcx> {
519 ecx.call_intrinsic(instance, args, ret, unwind)
524 ecx: &mut MiriEvalContext<'mir, 'tcx>,
525 msg: &mir::AssertMessage<'tcx>,
526 unwind: Option<mir::BasicBlock>,
527 ) -> InterpResult<'tcx> {
528 ecx.assert_panic(msg, unwind)
532 fn abort(_ecx: &mut MiriEvalContext<'mir, 'tcx>, msg: String) -> InterpResult<'tcx, !> {
533 throw_machine_stop!(TerminationInfo::Abort(msg))
538 ecx: &MiriEvalContext<'mir, 'tcx>,
540 left: &ImmTy<'tcx, Tag>,
541 right: &ImmTy<'tcx, Tag>,
542 ) -> InterpResult<'tcx, (Scalar<Tag>, bool, ty::Ty<'tcx>)> {
543 ecx.binary_ptr_op(bin_op, left, right)
546 fn thread_local_static_base_pointer(
547 ecx: &mut MiriEvalContext<'mir, 'tcx>,
549 ) -> InterpResult<'tcx, Pointer<Tag>> {
550 ecx.get_or_create_thread_local_alloc(def_id)
553 fn extern_static_base_pointer(
554 ecx: &MiriEvalContext<'mir, 'tcx>,
556 ) -> InterpResult<'tcx, Pointer<Tag>> {
557 let link_name = ecx.item_link_name(def_id);
558 if let Some(&ptr) = ecx.machine.extern_statics.get(&link_name) {
561 throw_unsup_format!("`extern` static {:?} is not supported by Miri", def_id)
565 fn init_allocation_extra<'b>(
566 ecx: &MiriEvalContext<'mir, 'tcx>,
568 alloc: Cow<'b, Allocation>,
569 kind: Option<MemoryKind<Self::MemoryKind>>,
570 ) -> Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>> {
571 if ecx.machine.tracked_alloc_ids.contains(&id) {
572 register_diagnostic(NonHaltingDiagnostic::CreatedAlloc(id));
575 let kind = kind.expect("we set our STATIC_KIND so this cannot be None");
576 let alloc = alloc.into_owned();
577 let stacks = if let Some(stacked_borrows) = &ecx.machine.stacked_borrows {
578 Some(Stacks::new_allocation(
583 &ecx.machine.threads,
584 ecx.machine.local_crates.clone(),
589 let race_alloc = if let Some(data_race) = &ecx.machine.data_race {
590 Some(data_race::AllocExtra::new_allocation(data_race, alloc.size(), kind))
594 let alloc: Allocation<Tag, Self::AllocExtra> = alloc.convert_tag_add_extra(
596 AllocExtra { stacked_borrows: stacks, data_race: race_alloc },
597 |ptr| Evaluator::tag_alloc_base_pointer(ecx, ptr),
602 fn tag_alloc_base_pointer(
603 ecx: &MiriEvalContext<'mir, 'tcx>,
604 ptr: Pointer<AllocId>,
606 let absolute_addr = intptrcast::GlobalStateInner::rel_ptr_to_addr(ecx, ptr);
607 let sb_tag = if let Some(stacked_borrows) = &ecx.machine.stacked_borrows {
608 stacked_borrows.borrow_mut().base_tag(ptr.provenance)
612 Pointer::new(Tag { alloc_id: ptr.provenance, sb: sb_tag }, Size::from_bytes(absolute_addr))
616 fn ptr_from_addr_cast(
617 ecx: &MiriEvalContext<'mir, 'tcx>,
619 ) -> Pointer<Option<Self::PointerTag>> {
620 intptrcast::GlobalStateInner::ptr_from_addr(addr, ecx)
624 fn ptr_from_addr_transmute(
625 ecx: &MiriEvalContext<'mir, 'tcx>,
627 ) -> Pointer<Option<Self::PointerTag>> {
628 Self::ptr_from_addr_cast(ecx, addr)
633 _ecx: &mut InterpCx<'mir, 'tcx, Self>,
634 _ptr: Pointer<Self::PointerTag>,
635 ) -> InterpResult<'tcx> {
639 /// Convert a pointer with provenance into an allocation-offset pair,
640 /// or a `None` with an absolute address if that conversion is not possible.
642 ecx: &MiriEvalContext<'mir, 'tcx>,
643 ptr: Pointer<Self::PointerTag>,
644 ) -> Option<(AllocId, Size, Self::TagExtra)> {
645 let rel = intptrcast::GlobalStateInner::abs_ptr_to_rel(ecx, ptr);
646 Some((ptr.provenance.alloc_id, rel, ptr.provenance.sb))
653 alloc_extra: &AllocExtra,
654 (alloc_id, tag): (AllocId, Self::TagExtra),
656 ) -> InterpResult<'tcx> {
657 if let Some(data_race) = &alloc_extra.data_race {
658 data_race.read(alloc_id, range, machine.data_race.as_ref().unwrap())?;
660 if let Some(stacked_borrows) = &alloc_extra.stacked_borrows {
661 stacked_borrows.memory_read(
665 machine.stacked_borrows.as_ref().unwrap(),
677 alloc_extra: &mut AllocExtra,
678 (alloc_id, tag): (AllocId, Self::TagExtra),
680 ) -> InterpResult<'tcx> {
681 if let Some(data_race) = &mut alloc_extra.data_race {
682 data_race.write(alloc_id, range, machine.data_race.as_mut().unwrap())?;
684 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
685 stacked_borrows.memory_written(
689 machine.stacked_borrows.as_ref().unwrap(),
698 fn memory_deallocated(
701 alloc_extra: &mut AllocExtra,
702 (alloc_id, tag): (AllocId, Self::TagExtra),
704 ) -> InterpResult<'tcx> {
705 if machine.tracked_alloc_ids.contains(&alloc_id) {
706 register_diagnostic(NonHaltingDiagnostic::FreedAlloc(alloc_id));
708 if let Some(data_race) = &mut alloc_extra.data_race {
709 data_race.deallocate(alloc_id, range, machine.data_race.as_mut().unwrap())?;
711 if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
712 stacked_borrows.memory_deallocated(
716 machine.stacked_borrows.as_ref().unwrap(),
725 ecx: &mut InterpCx<'mir, 'tcx, Self>,
726 kind: mir::RetagKind,
727 place: &PlaceTy<'tcx, Tag>,
728 ) -> InterpResult<'tcx> {
729 if ecx.machine.stacked_borrows.is_some() { ecx.retag(kind, place) } else { Ok(()) }
734 ecx: &mut InterpCx<'mir, 'tcx, Self>,
735 frame: Frame<'mir, 'tcx, Tag>,
736 ) -> InterpResult<'tcx, Frame<'mir, 'tcx, Tag, FrameData<'tcx>>> {
737 // Start recording our event before doing anything else
738 let timing = if let Some(profiler) = ecx.machine.profiler.as_ref() {
739 let fn_name = frame.instance.to_string();
740 let entry = ecx.machine.string_cache.entry(fn_name.clone());
741 let name = entry.or_insert_with(|| profiler.alloc_string(&*fn_name));
743 Some(profiler.start_recording_interval_event_detached(
745 measureme::EventId::from_label(*name),
746 ecx.get_active_thread().to_u32(),
752 let stacked_borrows = ecx.machine.stacked_borrows.as_ref();
753 let call_id = stacked_borrows.map_or(NonZeroU64::new(1).unwrap(), |stacked_borrows| {
754 stacked_borrows.borrow_mut().new_call()
757 let extra = FrameData { call_id, catch_unwind: None, timing };
758 Ok(frame.with_extra(extra))
762 ecx: &'a InterpCx<'mir, 'tcx, Self>,
763 ) -> &'a [Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>] {
764 ecx.active_thread_stack()
768 ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
769 ) -> &'a mut Vec<Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>> {
770 ecx.active_thread_stack_mut()
774 fn after_stack_push(ecx: &mut InterpCx<'mir, 'tcx, Self>) -> InterpResult<'tcx> {
775 if ecx.machine.stacked_borrows.is_some() { ecx.retag_return_place() } else { Ok(()) }
780 ecx: &mut InterpCx<'mir, 'tcx, Self>,
781 mut frame: Frame<'mir, 'tcx, Tag, FrameData<'tcx>>,
783 ) -> InterpResult<'tcx, StackPopJump> {
784 let timing = frame.extra.timing.take();
785 let res = ecx.handle_stack_pop(frame.extra, unwinding);
786 if let Some(profiler) = ecx.machine.profiler.as_ref() {
787 profiler.finish_recording_interval_event(timing.unwrap());