mir,
ty::{
self,
- layout::{LayoutCx, LayoutError, TyAndLayout},
- TyCtxt,
+ layout::{LayoutCx, LayoutError, LayoutOf, TyAndLayout},
+ Instance, TyCtxt,
},
};
use rustc_span::def_id::DefId;
use rustc_span::symbol::{sym, Symbol};
-use rustc_target::abi::{LayoutOf, Size};
+use rustc_target::abi::Size;
use rustc_target::spec::abi::Abi;
use crate::*;
impl<'tcx> std::fmt::Debug for FrameData<'tcx> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
// Omitting `timing`, it does not support `Debug`.
+ let FrameData { call_id, catch_unwind, timing: _ } = self;
f.debug_struct("FrameData")
- .field("call_id", &self.call_id)
- .field("catch_unwind", &self.catch_unwind)
+ .field("call_id", call_id)
+ .field("catch_unwind", catch_unwind)
.finish()
}
}
}
}
+/// Pointer provenance (tag).
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct Tag {
+ pub alloc_id: AllocId,
+ /// Stacked Borrows tag.
+ pub sb: SbTag,
+}
+
+impl Provenance for Tag {
+ /// We use absolute addresses in the `offset` of a `Pointer<Tag>`.
+ const OFFSET_IS_ADDR: bool = true;
+
+ /// We cannot err on partial overwrites, it happens too often in practice (due to unions).
+ const ERR_ON_PARTIAL_PTR_OVERWRITE: bool = false;
+
+ fn fmt(ptr: &Pointer<Self>, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ let (tag, addr) = ptr.into_parts(); // address is absolute
+ write!(f, "0x{:x}", addr.bytes())?;
+ // Forward `alternate` flag to `alloc_id` printing.
+ if f.alternate() {
+ write!(f, "[{:#?}]", tag.alloc_id)?;
+ } else {
+ write!(f, "[{:?}]", tag.alloc_id)?;
+ }
+ // Print Stacked Borrows tag.
+ write!(f, "{:?}", tag.sb)
+ }
+
+ fn get_alloc_id(self) -> AllocId {
+ self.alloc_id
+ }
+}
+
/// Extra per-allocation data
#[derive(Debug, Clone)]
pub struct AllocExtra {
pub data_race: Option<data_race::MemoryExtra>,
pub intptrcast: intptrcast::MemoryExtra,
- /// Mapping extern static names to their canonical allocation.
- extern_statics: FxHashMap<Symbol, AllocId>,
+ /// Mapping extern static names to their base pointer.
+ extern_statics: FxHashMap<Symbol, Pointer<Tag>>,
/// The random number generator used for resolving non-determinism.
/// Needs to be queried by ptr_to_int, hence needs interior mutability.
Some(RefCell::new(stacked_borrows::GlobalState::new(
config.tracked_pointer_tag,
config.tracked_call_id,
- config.track_raw,
+ config.tag_raw,
)))
} else {
None
fn add_extern_static<'tcx, 'mir>(
this: &mut MiriEvalContext<'mir, 'tcx>,
name: &str,
- ptr: Scalar<Tag>,
+ ptr: Pointer<Option<Tag>>,
) {
- let ptr = ptr.assert_ptr();
- assert_eq!(ptr.offset, Size::ZERO);
- this.memory.extra.extern_statics.try_insert(Symbol::intern(name), ptr.alloc_id).unwrap();
+ let ptr = ptr.into_pointer_or_addr().unwrap();
+ this.memory.extra.extern_statics.try_insert(Symbol::intern(name), ptr).unwrap();
}
/// Sets up the "extern statics" for this machine.
// "__cxa_thread_atexit_impl"
// This should be all-zero, pointer-sized.
let layout = this.machine.layouts.usize;
- let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into());
+ let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
this.write_scalar(Scalar::from_machine_usize(0, this), &place.into())?;
Self::add_extern_static(this, "__cxa_thread_atexit_impl", place.ptr);
// "environ"
// "_tls_used"
// This is some obscure hack that is part of the Windows TLS story. It's a `u8`.
let layout = this.machine.layouts.u8;
- let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into());
+ let place = this.allocate(layout, MiriMemoryKind::ExternStatic.into())?;
this.write_scalar(Scalar::from_u8(0), &place.into())?;
Self::add_extern_static(this, "_tls_used", place.ptr);
}
/// Program arguments (`Option` because we can only initialize them after creating the ecx).
/// These are *pointers* to argc/argv because macOS.
/// We also need the full command line as one string because of Windows.
- pub(crate) argc: Option<Scalar<Tag>>,
- pub(crate) argv: Option<Scalar<Tag>>,
- pub(crate) cmd_line: Option<Scalar<Tag>>,
+ pub(crate) argc: Option<MemPlace<Tag>>,
+ pub(crate) argv: Option<MemPlace<Tag>>,
+ pub(crate) cmd_line: Option<MemPlace<Tag>>,
/// TLS state.
pub(crate) tls: TlsData<'tcx>,
- /// If enabled, the `env_vars` field is populated with the host env vars during initialization
- /// and random number generation is delegated to the host.
- pub(crate) communicate: bool,
+ /// What should Miri do when an op requires communicating with the host,
+ /// such as accessing host env vars, random number generation, and
+ /// file system access.
+ pub(crate) isolated_op: IsolatedOp,
/// Whether to enforce the validity invariant.
pub(crate) validate: bool,
+ /// Whether to enforce validity (e.g., initialization) of integers and floats.
+ pub(crate) enforce_number_validity: bool,
+
+ /// Whether to enforce [ABI](Abi) of function calls.
+ pub(crate) enforce_abi: bool,
+
pub(crate) file_handler: shims::posix::FileHandler,
pub(crate) dir_handler: shims::posix::DirHandler,
/// Used with `profiler` to cache the `StringId`s for event names
/// uesd with `measureme`.
string_cache: FxHashMap<String, measureme::StringId>,
+
+ /// Cache of `Instance` exported under the given `Symbol` name.
+ /// `None` means no `Instance` exported under the given name is found.
+ pub(crate) exported_symbols_cache: FxHashMap<Symbol, Option<Instance<'tcx>>>,
+
+ /// Whether to raise a panic in the context of the evaluated process when unsupported
+ /// functionality is encountered. If `false`, an error is propagated in the Miri application context
+ /// instead (default behavior)
+ pub(crate) panic_on_unsupported: bool,
}
impl<'mir, 'tcx> Evaluator<'mir, 'tcx> {
argv: None,
cmd_line: None,
tls: TlsData::default(),
- communicate: config.communicate,
+ isolated_op: config.isolated_op,
validate: config.validate,
+ enforce_number_validity: config.check_number_validity,
+ enforce_abi: config.check_abi,
file_handler: Default::default(),
dir_handler: Default::default(),
time_anchor: Instant::now(),
static_roots: Vec::new(),
profiler,
string_cache: Default::default(),
+ exported_symbols_cache: FxHashMap::default(),
+ panic_on_unsupported: config.panic_on_unsupported,
}
}
+
+ pub(crate) fn communicate(&self) -> bool {
+ self.isolated_op == IsolatedOp::Allow
+ }
}
/// A rustc InterpCx for Miri.
const GLOBAL_KIND: Option<MiriMemoryKind> = Some(MiriMemoryKind::Global);
+ const PANIC_ON_ALLOC_FAIL: bool = false;
+
#[inline(always)]
fn enforce_alignment(memory_extra: &MemoryExtra) -> bool {
memory_extra.check_alignment != AlignmentCheck::None
ecx.machine.validate
}
+ #[inline(always)]
+ fn enforce_number_validity(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool {
+ ecx.machine.enforce_number_validity
+ }
+
+ #[inline(always)]
+ fn enforce_abi(ecx: &InterpCx<'mir, 'tcx, Self>) -> bool {
+ ecx.machine.enforce_abi
+ }
+
#[inline(always)]
fn find_mir_or_eval_fn(
ecx: &mut InterpCx<'mir, 'tcx, Self>,
#[inline(always)]
fn call_intrinsic(
- ecx: &mut rustc_mir::interpret::InterpCx<'mir, 'tcx, Self>,
+ ecx: &mut rustc_const_eval::interpret::InterpCx<'mir, 'tcx, Self>,
instance: ty::Instance<'tcx>,
args: &[OpTy<'tcx, Tag>],
ret: Option<(&PlaceTy<'tcx, Tag>, mir::BasicBlock)>,
#[inline(always)]
fn binary_ptr_op(
- ecx: &rustc_mir::interpret::InterpCx<'mir, 'tcx, Self>,
+ ecx: &rustc_const_eval::interpret::InterpCx<'mir, 'tcx, Self>,
bin_op: mir::BinOp,
left: &ImmTy<'tcx, Tag>,
right: &ImmTy<'tcx, Tag>,
Ok(())
}
- fn thread_local_static_alloc_id(
+ fn thread_local_static_base_pointer(
ecx: &mut InterpCx<'mir, 'tcx, Self>,
def_id: DefId,
- ) -> InterpResult<'tcx, AllocId> {
- ecx.get_or_create_thread_local_alloc_id(def_id)
+ ) -> InterpResult<'tcx, Pointer<Tag>> {
+ ecx.get_or_create_thread_local_alloc(def_id)
}
- fn extern_static_alloc_id(
+ fn extern_static_base_pointer(
memory: &Memory<'mir, 'tcx, Self>,
def_id: DefId,
- ) -> InterpResult<'tcx, AllocId> {
+ ) -> InterpResult<'tcx, Pointer<Tag>> {
let attrs = memory.tcx.get_attrs(def_id);
let link_name = match memory.tcx.sess.first_attr_value_str_by_name(&attrs, sym::link_name) {
Some(name) => name,
None => memory.tcx.item_name(def_id),
};
- if let Some(&id) = memory.extra.extern_statics.get(&link_name) {
- Ok(id)
+ if let Some(&ptr) = memory.extra.extern_statics.get(&link_name) {
+ Ok(ptr)
} else {
throw_unsup_format!("`extern` static {:?} is not supported by Miri", def_id)
}
}
fn init_allocation_extra<'b>(
- memory_extra: &MemoryExtra,
+ mem: &Memory<'mir, 'tcx, Self>,
id: AllocId,
alloc: Cow<'b, Allocation>,
kind: Option<MemoryKind<Self::MemoryKind>>,
- ) -> (Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>>, Self::PointerTag) {
- if Some(id) == memory_extra.tracked_alloc_id {
+ ) -> Cow<'b, Allocation<Self::PointerTag, Self::AllocExtra>> {
+ if Some(id) == mem.extra.tracked_alloc_id {
register_diagnostic(NonHaltingDiagnostic::CreatedAlloc(id));
}
let kind = kind.expect("we set our STATIC_KIND so this cannot be None");
let alloc = alloc.into_owned();
- let (stacks, base_tag) = if let Some(stacked_borrows) = &memory_extra.stacked_borrows {
- let (stacks, base_tag) =
- Stacks::new_allocation(id, alloc.size(), stacked_borrows, kind);
- (Some(stacks), base_tag)
+ let stacks = if let Some(stacked_borrows) = &mem.extra.stacked_borrows {
+ Some(Stacks::new_allocation(id, alloc.size(), stacked_borrows, kind))
} else {
- // No stacks, no tag.
- (None, Tag::Untagged)
+ None
};
- let race_alloc = if let Some(data_race) = &memory_extra.data_race {
+ let race_alloc = if let Some(data_race) = &mem.extra.data_race {
Some(data_race::AllocExtra::new_allocation(&data_race, alloc.size(), kind))
} else {
None
};
- let mut stacked_borrows = memory_extra.stacked_borrows.as_ref().map(|sb| sb.borrow_mut());
- let alloc: Allocation<Tag, Self::AllocExtra> = alloc.with_tags_and_extra(
- |alloc| {
- if let Some(stacked_borrows) = &mut stacked_borrows {
- // Only globals may already contain pointers at this point
- assert_eq!(kind, MiriMemoryKind::Global.into());
- stacked_borrows.global_base_ptr(alloc)
- } else {
- Tag::Untagged
- }
- },
+ let alloc: Allocation<Tag, Self::AllocExtra> = alloc.convert_tag_add_extra(
+ &mem.tcx,
AllocExtra { stacked_borrows: stacks, data_race: race_alloc },
+ |ptr| Evaluator::tag_alloc_base_pointer(mem, ptr),
);
- (Cow::Owned(alloc), base_tag)
+ Cow::Owned(alloc)
+ }
+
+ fn tag_alloc_base_pointer(
+ mem: &Memory<'mir, 'tcx, Self>,
+ ptr: Pointer<AllocId>,
+ ) -> Pointer<Tag> {
+ let absolute_addr = intptrcast::GlobalState::rel_ptr_to_addr(&mem, ptr);
+ let sb_tag = if let Some(stacked_borrows) = &mem.extra.stacked_borrows {
+ stacked_borrows.borrow_mut().base_tag(ptr.provenance)
+ } else {
+ SbTag::Untagged
+ };
+ Pointer::new(Tag { alloc_id: ptr.provenance, sb: sb_tag }, Size::from_bytes(absolute_addr))
+ }
+
+ #[inline(always)]
+ fn ptr_from_addr(
+ mem: &Memory<'mir, 'tcx, Self>,
+ addr: u64,
+ ) -> Pointer<Option<Self::PointerTag>> {
+ intptrcast::GlobalState::ptr_from_addr(addr, mem)
+ }
+
+ /// Convert a pointer with provenance into an allocation-offset pair,
+ /// or a `None` with an absolute address if that conversion is not possible.
+ fn ptr_get_alloc(
+ mem: &Memory<'mir, 'tcx, Self>,
+ ptr: Pointer<Self::PointerTag>,
+ ) -> (AllocId, Size) {
+ let rel = intptrcast::GlobalState::abs_ptr_to_rel(mem, ptr);
+ (ptr.provenance.alloc_id, rel)
}
#[inline(always)]
fn memory_read(
memory_extra: &Self::MemoryExtra,
alloc_extra: &AllocExtra,
- ptr: Pointer<Tag>,
- size: Size,
+ tag: Tag,
+ range: AllocRange,
) -> InterpResult<'tcx> {
if let Some(data_race) = &alloc_extra.data_race {
- data_race.read(ptr, size, memory_extra.data_race.as_ref().unwrap())?;
+ data_race.read(tag.alloc_id, range, memory_extra.data_race.as_ref().unwrap())?;
}
if let Some(stacked_borrows) = &alloc_extra.stacked_borrows {
- stacked_borrows.memory_read(ptr, size, memory_extra.stacked_borrows.as_ref().unwrap())
+ stacked_borrows.memory_read(
+ tag.alloc_id,
+ tag.sb,
+ range,
+ memory_extra.stacked_borrows.as_ref().unwrap(),
+ )
} else {
Ok(())
}
fn memory_written(
memory_extra: &mut Self::MemoryExtra,
alloc_extra: &mut AllocExtra,
- ptr: Pointer<Tag>,
- size: Size,
+ tag: Tag,
+ range: AllocRange,
) -> InterpResult<'tcx> {
if let Some(data_race) = &mut alloc_extra.data_race {
- data_race.write(ptr, size, memory_extra.data_race.as_mut().unwrap())?;
+ data_race.write(tag.alloc_id, range, memory_extra.data_race.as_mut().unwrap())?;
}
if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
stacked_borrows.memory_written(
- ptr,
- size,
+ tag.alloc_id,
+ tag.sb,
+ range,
memory_extra.stacked_borrows.as_mut().unwrap(),
)
} else {
fn memory_deallocated(
memory_extra: &mut Self::MemoryExtra,
alloc_extra: &mut AllocExtra,
- ptr: Pointer<Tag>,
- size: Size,
+ tag: Tag,
+ range: AllocRange,
) -> InterpResult<'tcx> {
- if Some(ptr.alloc_id) == memory_extra.tracked_alloc_id {
- register_diagnostic(NonHaltingDiagnostic::FreedAlloc(ptr.alloc_id));
+ if Some(tag.alloc_id) == memory_extra.tracked_alloc_id {
+ register_diagnostic(NonHaltingDiagnostic::FreedAlloc(tag.alloc_id));
}
if let Some(data_race) = &mut alloc_extra.data_race {
- data_race.deallocate(ptr, size, memory_extra.data_race.as_mut().unwrap())?;
+ data_race.deallocate(tag.alloc_id, range, memory_extra.data_race.as_mut().unwrap())?;
}
if let Some(stacked_borrows) = &mut alloc_extra.stacked_borrows {
stacked_borrows.memory_deallocated(
- ptr,
- size,
+ tag.alloc_id,
+ tag.sb,
+ range,
memory_extra.stacked_borrows.as_mut().unwrap(),
)
} else {
}
}
- fn after_static_mem_initialized(
- ecx: &mut InterpCx<'mir, 'tcx, Self>,
- ptr: Pointer<Self::PointerTag>,
- size: Size,
- ) -> InterpResult<'tcx> {
- if ecx.memory.extra.data_race.is_some() {
- ecx.reset_vector_clocks(ptr, size)?;
- }
- Ok(())
- }
-
- #[inline(always)]
- fn tag_global_base_pointer(memory_extra: &MemoryExtra, id: AllocId) -> Self::PointerTag {
- if let Some(stacked_borrows) = &memory_extra.stacked_borrows {
- stacked_borrows.borrow_mut().global_base_ptr(id)
- } else {
- Tag::Untagged
- }
- }
-
#[inline(always)]
fn retag(
ecx: &mut InterpCx<'mir, 'tcx, Self>,
}
res
}
-
- #[inline(always)]
- fn int_to_ptr(
- memory: &Memory<'mir, 'tcx, Self>,
- int: u64,
- ) -> InterpResult<'tcx, Pointer<Self::PointerTag>> {
- intptrcast::GlobalState::int_to_ptr(int, memory)
- }
-
- #[inline(always)]
- fn ptr_to_int(
- memory: &Memory<'mir, 'tcx, Self>,
- ptr: Pointer<Self::PointerTag>,
- ) -> InterpResult<'tcx, u64> {
- intptrcast::GlobalState::ptr_to_int(ptr, memory)
- }
}
projects / rust.git / blobdiff