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Auto merge of #58016 - Centril:rollup, r=Centril

Browse Source 
Rollup of 12 pull requests

Successful merges:

 - #57008 (suggest `|` when `,` founds in invalid match value)
 - #57106 (Mark str::trim.* functions as #[must_use].)
 - #57920 (use `SOURCE_DATE_EPOCH` for man page time if set)
 - #57934 (Introduce into_raw_non_null on Rc and Arc)
 - #57971 (SGX target: improve panic & exit handling)
 - #57980 (Add the edition guide to the bookshelf)
 - #57984 (Improve bug message in check_ty)
 - #57999 (Add MOVBE x86 CPU feature)
 - #58000 (Fixes and cleanups)
 - #58005 (update docs for fix_start/end_matches)
 - #58007 (Don't panic when accessing enum variant ctor using `Self` in match)
 - #58008 (Pass correct arguments to places_conflict)

Failed merges:

r? @ghost
This commit is contained in:
bors 2019-01-31 03:47:17 +00:00
commit f40aaa6827
29 changed files with 319 additions and 89 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/bootstrap/dist.rs
View File

@ -23,7 +23,7 @@ use crate::builder::{Builder, RunConfig, ShouldRun, Step};
use crate::compile;
use crate::tool::{self, Tool};
use crate::cache::{INTERNER, Interned};
use time;
use time::{self, Timespec};
pub fn pkgname(builder: &Builder, component: &str) -> String {
if component == "cargo" {
@ -528,7 +528,19 @@ impl Step for Rustc {
t!(fs::create_dir_all(image.join("share/man/man1")));
let man_src = builder.src.join("src/doc/man");
let man_dst = image.join("share/man/man1");
let month_year = t!(time::strftime("%B %Y", &time::now()));
// Reproducible builds: If SOURCE_DATE_EPOCH is set, use that as the time.
let time = env::var("SOURCE_DATE_EPOCH")
.map(|timestamp| {
let epoch = timestamp.parse().map_err(|err| {
format!("could not parse SOURCE_DATE_EPOCH: {}", err)
}).unwrap();
time::at(Timespec::new(epoch, 0))
})
.unwrap_or_else(|_| time::now());
let month_year = t!(time::strftime("%B %Y", &time));
// don't use our `bootstrap::util::{copy, cp_r}`, because those try
// to hardlink, and we don't want to edit the source templates
for file_entry in builder.read_dir(&man_src) {

4
src/doc/index.md
View File

@ -71,6 +71,10 @@ accomplishing various tasks.
</form>
</div>
## The Edition Guide
[The Edition Guide](edition-guide/index.html) describes the Rust editions.
## The Rustc Book
[The Rustc Book](rustc/index.html) describes the Rust compiler, `rustc`.

21
src/liballoc/rc.rs
View File

@ -433,6 +433,27 @@ impl<T: ?Sized> Rc<T> {
}
}
/// Consumes the `Rc`, returning the wrapped pointer as `NonNull<T>`.
///
/// # Examples
///
/// ```
/// #![feature(rc_into_raw_non_null)]
///
/// use std::rc::Rc;
///
/// let x = Rc::new(10);
/// let ptr = Rc::into_raw_non_null(x);
/// let deref = unsafe { *ptr.as_ref() };
/// assert_eq!(deref, 10);
/// ```
#[unstable(feature = "rc_into_raw_non_null", issue = "47336")]
#[inline]
pub fn into_raw_non_null(this: Self) -> NonNull<T> {
// safe because Rc guarantees its pointer is non-null
unsafe { NonNull::new_unchecked(Rc::into_raw(this) as *mut _) }
}
/// Creates a new [`Weak`][weak] pointer to this value.
///
/// [weak]: struct.Weak.html

21
src/liballoc/sync.rs
View File

@ -413,6 +413,27 @@ impl<T: ?Sized> Arc<T> {
}
}
/// Consumes the `Arc`, returning the wrapped pointer as `NonNull<T>`.
///
/// # Examples
///
/// ```
/// #![feature(rc_into_raw_non_null)]
///
/// use std::sync::Arc;
///
/// let x = Arc::new(10);
/// let ptr = Arc::into_raw_non_null(x);
/// let deref = unsafe { *ptr.as_ref() };
/// assert_eq!(deref, 10);
/// ```
#[unstable(feature = "rc_into_raw_non_null", issue = "47336")]
#[inline]
pub fn into_raw_non_null(this: Self) -> NonNull<T> {
// safe because Arc guarantees its pointer is non-null
unsafe { NonNull::new_unchecked(Arc::into_raw(this) as *mut _) }
}
/// Creates a new [`Weak`][weak] pointer to this value.
///
/// [weak]: struct.Weak.html

28
src/libcore/str/mod.rs
View File

@ -3489,6 +3489,8 @@ impl str {
///
/// assert_eq!("Hello\tworld", s.trim());
/// ```
#[must_use = "this returns the trimmed string as a slice, \
without modifying the original"]
#[stable(feature = "rust1", since = "1.0.0")]
pub fn trim(&self) -> &str {
self.trim_matches(|c: char| c.is_whitespace())
@ -3524,6 +3526,8 @@ impl str {
/// let s = " עברית ";
/// assert!(Some('ע') == s.trim_start().chars().next());
/// ```
#[must_use = "this returns the trimmed string as a new slice, \
without modifying the original"]
#[stable(feature = "trim_direction", since = "1.30.0")]
pub fn trim_start(&self) -> &str {
self.trim_start_matches(|c: char| c.is_whitespace())
@ -3559,6 +3563,8 @@ impl str {
/// let s = " עברית ";
/// assert!(Some('ת') == s.trim_end().chars().rev().next());
/// ```
#[must_use = "this returns the trimmed string as a new slice, \
without modifying the original"]
#[stable(feature = "trim_direction", since = "1.30.0")]
pub fn trim_end(&self) -> &str {
self.trim_end_matches(|c: char| c.is_whitespace())
@ -3661,6 +3667,8 @@ impl str {
/// ```
/// assert_eq!("1foo1barXX".trim_matches(|c| c == '1' || c == 'X'), "foo1bar");
/// ```
#[must_use = "this returns the trimmed string as a new slice, \
without modifying the original"]
#[stable(feature = "rust1", since = "1.0.0")]
pub fn trim_matches<'a, P: Pattern<'a>>(&'a self, pat: P) -> &'a str
where P::Searcher: DoubleEndedSearcher<'a>
@ -3706,6 +3714,8 @@ impl str {
/// let x: &[_] = &['1', '2'];
/// assert_eq!("12foo1bar12".trim_start_matches(x), "foo1bar12");
/// ```
#[must_use = "this returns the trimmed string as a new slice, \
without modifying the original"]
#[stable(feature = "trim_direction", since = "1.30.0")]
pub fn trim_start_matches<'a, P: Pattern<'a>>(&'a self, pat: P) -> &'a str {
let mut i = self.len();
@ -3749,6 +3759,8 @@ impl str {
/// ```
/// assert_eq!("1fooX".trim_end_matches(|c| c == '1' || c == 'X'), "1foo");
/// ```
#[must_use = "this returns the trimmed string as a new slice, \
without modifying the original"]
#[stable(feature = "trim_direction", since = "1.30.0")]
pub fn trim_end_matches<'a, P: Pattern<'a>>(&'a self, pat: P) -> &'a str
where P::Searcher: ReverseSearcher<'a>
@ -3774,10 +3786,10 @@ impl str {
///
/// # Text directionality
///
/// A string is a sequence of bytes. 'Left' in this context means the first
/// position of that byte string; for a language like Arabic or Hebrew
/// which are 'right to left' rather than 'left to right', this will be
/// the _right_ side, not the left.
/// A string is a sequence of bytes. `start` in this context means the first
/// position of that byte string; for a left-to-right language like English or
/// Russian, this will be left side; and for right-to-left languages like
/// like Arabic or Hebrew, this will be the right side.
///
/// # Examples
///
@ -3806,10 +3818,10 @@ impl str {
///
/// # Text directionality
///
/// A string is a sequence of bytes. 'Right' in this context means the last
/// position of that byte string; for a language like Arabic or Hebrew
/// which are 'right to left' rather than 'left to right', this will be
/// the _left_ side, not the right.
/// A string is a sequence of bytes. `end` in this context means the last
/// position of that byte string; for a left-to-right language like English or
/// Russian, this will be right side; and for right-to-left languages like
/// like Arabic or Hebrew, this will be the left side.
///
/// # Examples
///

2
src/librustc/mir/interpret/value.rs
View File

@ -14,7 +14,7 @@ pub struct RawConst<'tcx> {
}
/// Represents a constant value in Rust. Scalar and ScalarPair are optimizations which
/// matches the LocalValue optimizations for easy conversions between Value and ConstValue.
/// matches the LocalState optimizations for easy conversions between Value and ConstValue.
#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, RustcEncodable, RustcDecodable, Hash)]
pub enum ConstValue<'tcx> {
/// Used only for types with layout::abi::Scalar ABI and ZSTs

1
src/librustc_codegen_llvm/llvm_util.rs
View File

@ -147,6 +147,7 @@ const X86_WHITELIST: &[(&str, Option<&str>)] = &[
("fxsr", None),
("lzcnt", None),
("mmx", Some("mmx_target_feature")),
("movbe", Some("movbe_target_feature")),
("pclmulqdq", None),
("popcnt", None),
("rdrand", None),

2
src/librustc_mir/dataflow/impls/borrows.rs
View File

@ -215,8 +215,8 @@ impl<'a, 'gcx, 'tcx> Borrows<'a, 'gcx, 'tcx> {
if places_conflict::places_conflict(
self.tcx,
self.mir,
place,
&borrow_data.borrowed_place,
place,
places_conflict::PlaceConflictBias::NoOverlap,
) {
debug!(

72
src/librustc_mir/interpret/eval_context.rs
View File

@ -76,8 +76,7 @@ pub struct Frame<'mir, 'tcx: 'mir, Tag=(), Extra=()> {
/// The locals are stored as `Option<Value>`s.
/// `None` represents a local that is currently dead, while a live local
/// can either directly contain `Scalar` or refer to some part of an `Allocation`.
pub locals: IndexVec<mir::Local, LocalValue<Tag>>,
pub local_layouts: IndexVec<mir::Local, Cell<Option<TyLayout<'tcx>>>>,
pub locals: IndexVec<mir::Local, LocalState<'tcx, Tag>>,
////////////////////////////////////////////////////////////////////////////////
// Current position within the function
@ -106,7 +105,15 @@ pub enum StackPopCleanup {
None { cleanup: bool },
}
// State of a local variable
/// State of a local variable including a memoized layout
#[derive(Clone, PartialEq, Eq)]
pub struct LocalState<'tcx, Tag=(), Id=AllocId> {
pub state: LocalValue<Tag, Id>,
/// Don't modify if `Some`, this is only used to prevent computing the layout twice
pub layout: Cell<Option<TyLayout<'tcx>>>,
}
/// State of a local variable
#[derive(Copy, Clone, PartialEq, Eq, Hash)]
pub enum LocalValue<Tag=(), Id=AllocId> {
Dead,
@ -117,16 +124,16 @@ pub enum LocalValue<Tag=(), Id=AllocId> {
Live(Operand<Tag, Id>),
}
impl<'tcx, Tag> LocalValue<Tag> {
impl<'tcx, Tag> LocalState<'tcx, Tag> {
pub fn access(&self) -> EvalResult<'tcx, &Operand<Tag>> {
match self {
match self.state {
LocalValue::Dead => err!(DeadLocal),
LocalValue::Live(ref val) => Ok(val),
}
}
pub fn access_mut(&mut self) -> EvalResult<'tcx, &mut Operand<Tag>> {
match self {
match self.state {
LocalValue::Dead => err!(DeadLocal),
LocalValue::Live(ref mut val) => Ok(val),
}
@ -310,17 +317,21 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
pub fn layout_of_local(
&self,
frame: &Frame<'mir, 'tcx, M::PointerTag, M::FrameExtra>,
local: mir::Local
local: mir::Local,
layout: Option<TyLayout<'tcx>>,
) -> EvalResult<'tcx, TyLayout<'tcx>> {
let cell = &frame.local_layouts[local];
if cell.get().is_none() {
let local_ty = frame.mir.local_decls[local].ty;
let local_ty = self.monomorphize_with_substs(local_ty, frame.instance.substs);
let layout = self.layout_of(local_ty)?;
cell.set(Some(layout));
match frame.locals[local].layout.get() {
None => {
let layout = ::interpret::operand::from_known_layout(layout, || {
let local_ty = frame.mir.local_decls[local].ty;
let local_ty = self.monomorphize_with_substs(local_ty, frame.instance.substs);
self.layout_of(local_ty)
})?;
frame.locals[local].layout.set(Some(layout));
Ok(layout)
}
Some(layout) => Ok(layout),
}
Ok(cell.get().unwrap())
}
pub fn str_to_immediate(&mut self, s: &str) -> EvalResult<'tcx, Immediate<M::PointerTag>> {
@ -454,7 +465,6 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
// empty local array, we fill it in below, after we are inside the stack frame and
// all methods actually know about the frame
locals: IndexVec::new(),
local_layouts: IndexVec::from_elem_n(Default::default(), mir.local_decls.len()),
span,
instance,
stmt: 0,
@ -466,12 +476,16 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
// We put some marker immediate into the locals that we later want to initialize.
// This can be anything except for LocalValue::Dead -- because *that* is the
// value we use for things that we know are initially dead.
let dummy =
LocalValue::Live(Operand::Immediate(Immediate::Scalar(ScalarMaybeUndef::Undef)));
let dummy = LocalState {
state: LocalValue::Live(Operand::Immediate(Immediate::Scalar(
ScalarMaybeUndef::Undef,
))),
layout: Cell::new(None),
};
let mut locals = IndexVec::from_elem(dummy, &mir.local_decls);
// Return place is handled specially by the `eval_place` functions, and the
// entry in `locals` should never be used. Make it dead, to be sure.
locals[mir::RETURN_PLACE] = LocalValue::Dead;
locals[mir::RETURN_PLACE].state = LocalValue::Dead;
// Now mark those locals as dead that we do not want to initialize
match self.tcx.describe_def(instance.def_id()) {
// statics and constants don't have `Storage*` statements, no need to look for them
@ -484,7 +498,7 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
match stmt.kind {
StorageLive(local) |
StorageDead(local) => {
locals[local] = LocalValue::Dead;
locals[local].state = LocalValue::Dead;
}
_ => {}
}
@ -494,11 +508,13 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
}
// Finally, properly initialize all those that still have the dummy value
for (idx, local) in locals.iter_enumerated_mut() {
match *local {
match local.state {
LocalValue::Live(_) => {
// This needs to be peoperly initialized.
let layout = self.layout_of_local(self.frame(), idx)?;
*local = LocalValue::Live(self.uninit_operand(layout)?);
// This needs to be properly initialized.
let ty = self.monomorphize(mir.local_decls[idx].ty)?;
let layout = self.layout_of(ty)?;
local.state = LocalValue::Live(self.uninit_operand(layout)?);
local.layout = Cell::new(Some(layout));
}
LocalValue::Dead => {
// Nothing to do
@ -543,7 +559,7 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
}
// Deallocate all locals that are backed by an allocation.
for local in frame.locals {
self.deallocate_local(local)?;
self.deallocate_local(local.state)?;
}
// Validate the return value. Do this after deallocating so that we catch dangling
// references.
@ -591,10 +607,10 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
assert!(local != mir::RETURN_PLACE, "Cannot make return place live");
trace!("{:?} is now live", local);
let layout = self.layout_of_local(self.frame(), local)?;
let layout = self.layout_of_local(self.frame(), local, None)?;
let init = LocalValue::Live(self.uninit_operand(layout)?);
// StorageLive *always* kills the value that's currently stored
Ok(mem::replace(&mut self.frame_mut().locals[local], init))
Ok(mem::replace(&mut self.frame_mut().locals[local].state, init))
}
/// Returns the old value of the local.
@ -603,7 +619,7 @@ impl<'a, 'mir, 'tcx: 'mir, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tc
assert!(local != mir::RETURN_PLACE, "Cannot make return place dead");
trace!("{:?} is now dead", local);
mem::replace(&mut self.frame_mut().locals[local], LocalValue::Dead)
mem::replace(&mut self.frame_mut().locals[local].state, LocalValue::Dead)
}
pub(super) fn deallocate_local(

2
src/librustc_mir/interpret/mod.rs
View File

@ -18,7 +18,7 @@ mod visitor;
pub use rustc::mir::interpret::*; // have all the `interpret` symbols in one place: here
pub use self::eval_context::{
EvalContext, Frame, StackPopCleanup, LocalValue,
EvalContext, Frame, StackPopCleanup, LocalState, LocalValue,
};
pub use self::place::{Place, PlaceTy, MemPlace, MPlaceTy};

14
src/librustc_mir/interpret/operand.rs
View File

@ -227,7 +227,7 @@ impl<'tcx, Tag> OpTy<'tcx, Tag>
// Use the existing layout if given (but sanity check in debug mode),
// or compute the layout.
#[inline(always)]
fn from_known_layout<'tcx>(
pub(super) fn from_known_layout<'tcx>(
layout: Option<TyLayout<'tcx>>,
compute: impl FnOnce() -> EvalResult<'tcx, TyLayout<'tcx>>
) -> EvalResult<'tcx, TyLayout<'tcx>> {
@ -457,14 +457,15 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tcx, M>
}
/// This is used by [priroda](https://github.com/oli-obk/priroda) to get an OpTy from a local
fn access_local(
pub fn access_local(
&self,
frame: &super::Frame<'mir, 'tcx, M::PointerTag, M::FrameExtra>,
local: mir::Local,
layout: Option<TyLayout<'tcx>>,
) -> EvalResult<'tcx, OpTy<'tcx, M::PointerTag>> {
assert_ne!(local, mir::RETURN_PLACE);
let op = *frame.locals[local].access()?;
let layout = self.layout_of_local(frame, local)?;
let layout = self.layout_of_local(frame, local, layout)?;
Ok(OpTy { op, layout })
}
@ -473,14 +474,15 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tcx, M>
fn eval_place_to_op(
&self,
mir_place: &mir::Place<'tcx>,
layout: Option<TyLayout<'tcx>>,
) -> EvalResult<'tcx, OpTy<'tcx, M::PointerTag>> {
use rustc::mir::Place::*;
let op = match *mir_place {
Local(mir::RETURN_PLACE) => return err!(ReadFromReturnPointer),
Local(local) => self.access_local(self.frame(), local)?,
Local(local) => self.access_local(self.frame(), local, layout)?,
Projection(ref proj) => {
let op = self.eval_place_to_op(&proj.base)?;
let op = self.eval_place_to_op(&proj.base, None)?;
self.operand_projection(op, &proj.elem)?
}
@ -504,7 +506,7 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tcx, M>
// FIXME: do some more logic on `move` to invalidate the old location
Copy(ref place) |
Move(ref place) =>
self.eval_place_to_op(place)?,
self.eval_place_to_op(place, layout)?,
Constant(ref constant) => {
let layout = from_known_layout(layout, || {

6
src/librustc_mir/interpret/place.rs
View File

@ -624,7 +624,7 @@ where
// their layout on return.
PlaceTy {
place: *return_place,
layout: self.layout_of_local(self.frame(), mir::RETURN_PLACE)?,
layout: self.layout_of(self.monomorphize(self.frame().mir.return_ty())?)?,
},
None => return err!(InvalidNullPointerUsage),
},
@ -633,7 +633,7 @@ where
frame: self.cur_frame(),
local,
},
layout: self.layout_of_local(self.frame(), local)?,
layout: self.layout_of_local(self.frame(), local, None)?,
},
Projection(ref proj) => {
@ -901,7 +901,7 @@ where
// We need the layout of the local. We can NOT use the layout we got,
// that might e.g., be an inner field of a struct with `Scalar` layout,
// that has different alignment than the outer field.
let local_layout = self.layout_of_local(&self.stack[frame], local)?;
let local_layout = self.layout_of_local(&self.stack[frame], local, None)?;
let ptr = self.allocate(local_layout, MemoryKind::Stack);
// We don't have to validate as we can assume the local
// was already valid for its type.

22
src/librustc_mir/interpret/snapshot.rs
View File

@ -23,8 +23,8 @@ use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use syntax::ast::Mutability;
use syntax::source_map::Span;
use super::eval_context::{LocalValue, StackPopCleanup};
use super::{Frame, Memory, Operand, MemPlace, Place, Immediate, ScalarMaybeUndef};
use super::eval_context::{LocalState, StackPopCleanup};
use super::{Frame, Memory, Operand, MemPlace, Place, Immediate, ScalarMaybeUndef, LocalValue};
use const_eval::CompileTimeInterpreter;
#[derive(Default)]
@ -321,7 +321,6 @@ impl_stable_hash_for!(impl<'mir, 'tcx: 'mir> for struct Frame<'mir, 'tcx> {
return_to_block,
return_place -> (return_place.as_ref().map(|r| &**r)),
locals,
local_layouts -> _,
block,
stmt,
extra,
@ -340,7 +339,6 @@ impl<'a, 'mir, 'tcx, Ctx> Snapshot<'a, Ctx> for &'a Frame<'mir, 'tcx>
return_to_block,
return_place,
locals,
local_layouts: _,
block,
stmt,
extra: _,
@ -358,6 +356,22 @@ impl<'a, 'mir, 'tcx, Ctx> Snapshot<'a, Ctx> for &'a Frame<'mir, 'tcx>
}
}
impl<'a, 'tcx, Ctx> Snapshot<'a, Ctx> for &'a LocalState<'tcx>
where Ctx: SnapshotContext<'a>,
{
type Item = LocalValue<(), AllocIdSnapshot<'a>>;
fn snapshot(&self, ctx: &'a Ctx) -> Self::Item {
let LocalState { state, layout: _ } = self;
state.snapshot(ctx)
}
}
impl_stable_hash_for!(struct LocalState<'tcx> {
state,
layout -> _,
});
impl<'a, 'b, 'mir, 'tcx: 'a+'mir> SnapshotContext<'b>
for Memory<'a, 'mir, 'tcx, CompileTimeInterpreter<'a, 'mir, 'tcx>>
{

4
src/librustc_mir/interpret/terminator.rs
View File

@ -309,7 +309,7 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tcx, M>
mir.spread_arg,
mir.args_iter()
.map(|local|
(local, self.layout_of_local(self.frame(), local).unwrap().ty)
(local, self.layout_of_local(self.frame(), local, None).unwrap().ty)
)
.collect::<Vec<_>>()
);
@ -383,7 +383,7 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tcx, M>
}
} else {
let callee_layout =
self.layout_of_local(self.frame(), mir::RETURN_PLACE)?;
self.layout_of_local(self.frame(), mir::RETURN_PLACE, None)?;
if !callee_layout.abi.is_uninhabited() {
return err!(FunctionRetMismatch(
self.tcx.types.never, callee_layout.ty

3
src/librustc_typeck/check/_match.rs
View File

@ -784,7 +784,8 @@ https://doc.rust-lang.org/reference/types.html#trait-objects");
report_unexpected_variant_def(tcx, &def, pat.span, qpath);
return tcx.types.err;
}
Def::VariantCtor(_, CtorKind::Fictive) => {
Def::VariantCtor(_, CtorKind::Fictive) |
Def::VariantCtor(_, CtorKind::Fn) => {
report_unexpected_variant_def(tcx, &def, pat.span, qpath);
return tcx.types.err;
}

5
src/librustc_typeck/collect.rs
View File

@ -1303,12 +1303,12 @@ fn type_of<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> Ty<'tcx> {
}
},
Node::GenericParam(param) => match param.kind {
Node::GenericParam(param) => match &param.kind {
hir::GenericParamKind::Type {
default: Some(ref ty),
..
} => icx.to_ty(ty),
_ => bug!("unexpected non-type NodeGenericParam"),
x => bug!("unexpected non-type Node::GenericParam: {:?}", x),
},
x => {
@ -2205,6 +2205,7 @@ fn from_target_feature(
Some("wasm_target_feature") => rust_features.wasm_target_feature,
Some("cmpxchg16b_target_feature") => rust_features.cmpxchg16b_target_feature,
Some("adx_target_feature") => rust_features.adx_target_feature,
Some("movbe_target_feature") => rust_features.movbe_target_feature,
Some(name) => bug!("unknown target feature gate {}", name),
None => true,
};

20
src/libstd/sys/sgx/abi/entry.S
View File

@ -66,7 +66,7 @@ IMAGE_BASE:
globvar EH_FRM_HDR_SIZE 8
.Lreentry_panic_msg:
.asciz "Re-entered panicked enclave!"
.asciz "Re-entered aborted enclave!"
.Lreentry_panic_msg_end:
.Lusercall_panic_msg:
@ -80,7 +80,7 @@ IMAGE_BASE:
.org .+48 /* reserved bits */
.data
.Lpanicked:
.Laborted:
.byte 0
/* TCS local storage section */
@ -134,6 +134,9 @@ sgx_entry:
jz .Lskip_debug_init
mov %r10,%gs:tcsls_debug_panic_buf_ptr
.Lskip_debug_init:
/* check for abort */
bt $0,.Laborted(%rip)
jc .Lreentry_panic
/* check if returning from usercall */
mov %gs:tcsls_last_rsp,%r11
test %r11,%r11
@ -164,9 +167,6 @@ sgx_entry:
mov %r14,%r8
mov %r15,%r9
.Lskip_init:
/* check for panic */
bt $0,.Lpanicked(%rip)
jc .Lreentry_panic
/* call into main entry point */
load_tcsls_flag_secondary_bool cx /* RCX = entry() argument: secondary: bool */
call entry /* RDI, RSI, RDX, R8, R9 passed in from userspace */
@ -237,18 +237,18 @@ sgx_entry:
stmxcsr (%rsp)
.endm
.global panic_exit
panic_exit:
.global usercall_exit
usercall_exit:
/* save registers in DEBUG mode, so that debugger can reconstruct the stack */
testb $0xff,DEBUG(%rip)
jz .Lskip_save_registers
push_callee_saved_registers
movq %rsp,%gs:tcsls_panic_last_rsp
.Lskip_save_registers:
/* set panicked bit */
movb $1,.Lpanicked(%rip)
/* set aborted bit */
movb $1,.Laborted(%rip)
/* call usercall exit(true) */
mov $1,%esi /* RSI = usercall() argument: panic = true */
/* NOP: mov %rsi,%rsi */ /* RSI = usercall() argument: panic */
xor %rdx,%rdx /* RDX cleared */
movq $usercall_nr_exit,%rdi /* RDI = usercall exit */
jmp .Lexit

30
src/libstd/sys/sgx/abi/panic.rs
View File

@ -1,12 +1,18 @@
use super::usercalls::alloc::UserRef;
use cmp;
use io::{self, Write};
use slice::from_raw_parts_mut;
use mem;
extern "C" {
fn take_debug_panic_buf_ptr() -> *mut u8;
static DEBUG: u8;
}
pub(crate) struct SgxPanicOutput(Option<&'static mut [u8]>);
pub(crate) struct SgxPanicOutput(Option<&'static mut UserRef<[u8]>>);
fn empty_user_slice() -> &'static mut UserRef<[u8]> {
unsafe { UserRef::from_raw_parts_mut(1 as *mut u8, 0) }
}
impl SgxPanicOutput {
pub(crate) fn new() -> Option<Self> {
@ -17,32 +23,36 @@ impl SgxPanicOutput {
}
}
fn init(&mut self) -> &mut &'static mut [u8] {
fn init(&mut self) -> &mut &'static mut UserRef<[u8]> {
self.0.get_or_insert_with(|| unsafe {
let ptr = take_debug_panic_buf_ptr();
if ptr.is_null() {
&mut []
empty_user_slice()
} else {
from_raw_parts_mut(ptr, 1024)
UserRef::from_raw_parts_mut(ptr, 1024)
}
})
}
}
impl Write for SgxPanicOutput {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.init().write(buf)
fn write(&mut self, src: &[u8]) -> io::Result<usize> {
let dst = mem::replace(self.init(), empty_user_slice());
let written = cmp::min(src.len(), dst.len());
dst[..written].copy_from_enclave(&src[..written]);
self.0 = Some(&mut dst[written..]);
Ok(written)
}
fn flush(&mut self) -> io::Result<()> {
self.init().flush()
Ok(())
}
}
#[no_mangle]
pub extern "C" fn panic_msg(msg: &str) -> ! {
let _ = SgxPanicOutput::new().map(|mut out| out.write(msg.as_bytes()));
unsafe { panic_exit(); }
unsafe { usercall_exit(true); }
}
extern "C" { pub fn panic_exit() -> !; }
extern "C" { pub fn usercall_exit(panic: bool) -> !; }

2
src/libstd/sys/sgx/abi/usercalls/mod.rs
View File

@ -119,7 +119,7 @@ pub unsafe fn launch_thread() -> IoResult<()> {
/// Usercall `exit`. See the ABI documentation for more information.
#[unstable(feature = "sgx_platform", issue = "56975")]
pub fn exit(panic: bool) -> ! {
unsafe { raw::exit(panic) }
unsafe { super::panic::usercall_exit(panic) }
}
/// Usercall `wait`. See the ABI documentation for more information.

2
src/libstd/sys/sgx/mod.rs
View File

@ -125,7 +125,7 @@ pub unsafe fn strlen(mut s: *const c_char) -> usize {
}
pub unsafe fn abort_internal() -> ! {
abi::panic::panic_exit()
abi::panic::usercall_exit(true)
}
pub fn hashmap_random_keys() -> (u64, u64) {

1
src/libsyntax/feature_gate.rs
View File

@ -394,6 +394,7 @@ declare_features! (
(active, wasm_target_feature, "1.30.0", Some(44839), None),
(active, adx_target_feature, "1.32.0", Some(44839), None),
(active, cmpxchg16b_target_feature, "1.32.0", Some(44839), None),
(active, movbe_target_feature, "1.34.0", Some(44839), None),
// Allows macro invocations on modules expressions and statements and
// procedural macros to expand to non-items.

7
src/libsyntax/parse/parser.rs
View File

@ -4381,9 +4381,14 @@ impl<'a> Parser<'a> {
if let Ok(seq_snippet) = self.sess.source_map().span_to_snippet(seq_span) {
err.span_suggestion(
seq_span,
"try adding parentheses",
"try adding parentheses to match on a tuple..",
format!("({})", seq_snippet),
Applicability::MachineApplicable
).span_suggestion(
seq_span,
"..or a vertical bar to match on multiple alternatives",
format!("{}", seq_snippet.replace(",", " |")),
Applicability::MachineApplicable
);
}
return Err(err);

60
src/test/ui/did_you_mean/issue-48492-tuple-destructure-missing-parens.stderr
View File

@ -2,37 +2,85 @@ error: unexpected `,` in pattern
--> $DIR/issue-48492-tuple-destructure-missing-parens.rs:38:17
|
LL | while let b1, b2, b3 = reading_frame.next().expect("there should be a start codon") {
| --^------- help: try adding parentheses: `(b1, b2, b3)`
| ^
help: try adding parentheses to match on a tuple..
|
LL | while let (b1, b2, b3) = reading_frame.next().expect("there should be a start codon") {
| ^^^^^^^^^^^^
help: ..or a vertical bar to match on multiple alternatives
|
LL | while let b1 | b2 | b3 = reading_frame.next().expect("there should be a start codon") {
| ^^^^^^^^^^^^
error: unexpected `,` in pattern
--> $DIR/issue-48492-tuple-destructure-missing-parens.rs:49:14
|
LL | if let b1, b2, b3 = reading_frame.next().unwrap() {
| --^------- help: try adding parentheses: `(b1, b2, b3)`
| ^
help: try adding parentheses to match on a tuple..
|
LL | if let (b1, b2, b3) = reading_frame.next().unwrap() {
| ^^^^^^^^^^^^
help: ..or a vertical bar to match on multiple alternatives
|
LL | if let b1 | b2 | b3 = reading_frame.next().unwrap() {
| ^^^^^^^^^^^^
error: unexpected `,` in pattern
--> $DIR/issue-48492-tuple-destructure-missing-parens.rs:59:28
|
LL | Nucleotide::Adenine, Nucleotide::Cytosine, _ => true
| -------------------^------------------------ help: try adding parentheses: `(Nucleotide::Adenine, Nucleotide::Cytosine, _)`
| ^
help: try adding parentheses to match on a tuple..
|
LL | (Nucleotide::Adenine, Nucleotide::Cytosine, _) => true
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: ..or a vertical bar to match on multiple alternatives
|
LL | Nucleotide::Adenine | Nucleotide::Cytosine | _ => true
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: unexpected `,` in pattern
--> $DIR/issue-48492-tuple-destructure-missing-parens.rs:67:10
|
LL | for x, _barr_body in women.iter().map(|woman| woman.allosomes.clone()) {
| -^----------- help: try adding parentheses: `(x, _barr_body)`
| ^
help: try adding parentheses to match on a tuple..
|
LL | for (x, _barr_body) in women.iter().map(|woman| woman.allosomes.clone()) {
| ^^^^^^^^^^^^^^^
help: ..or a vertical bar to match on multiple alternatives
|
LL | for x | _barr_body in women.iter().map(|woman| woman.allosomes.clone()) {
| ^^^^^^^^^^^^^^
error: unexpected `,` in pattern
--> $DIR/issue-48492-tuple-destructure-missing-parens.rs:75:10
|
LL | for x, y @ Allosome::Y(_) in men.iter().map(|man| man.allosomes.clone()) {
| -^------------------- help: try adding parentheses: `(x, y @ Allosome::Y(_))`
| ^
help: try adding parentheses to match on a tuple..
|
LL | for (x, y @ Allosome::Y(_)) in men.iter().map(|man| man.allosomes.clone()) {
| ^^^^^^^^^^^^^^^^^^^^^^^
help: ..or a vertical bar to match on multiple alternatives
|
LL | for x | y @ Allosome::Y(_) in men.iter().map(|man| man.allosomes.clone()) {
| ^^^^^^^^^^^^^^^^^^^^^^
error: unexpected `,` in pattern
--> $DIR/issue-48492-tuple-destructure-missing-parens.rs:84:14
|
LL | let women, men: (Vec<Genome>, Vec<Genome>) = genomes.iter().cloned()
| -----^---- help: try adding parentheses: `(women, men)`
| ^
help: try adding parentheses to match on a tuple..
|
LL | let (women, men): (Vec<Genome>, Vec<Genome>) = genomes.iter().cloned()
| ^^^^^^^^^^^^
help: ..or a vertical bar to match on multiple alternatives
|
LL | let women | men: (Vec<Genome>, Vec<Genome>) = genomes.iter().cloned()
| ^^^^^^^^^^^
error: aborting due to 6 previous errors

15
src/test/ui/issues/issue-58006.rs Normal file
View File

@ -0,0 +1,15 @@
#![feature(type_alias_enum_variants)]
pub enum Enum {
A(usize),
}
impl Enum {
fn foo(&self) -> () {
match self {
Self::A => (),
//~^ ERROR expected unit struct/variant or constant, found tuple variant
}
}
}
fn main() {}

9
src/test/ui/issues/issue-58006.stderr Normal file
View File

@ -0,0 +1,9 @@
error[E0533]: expected unit struct/variant or constant, found tuple variant `<Self>::A`
--> $DIR/issue-58006.rs:9:13
|
LL | Self::A => (),
| ^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0533`.

12
src/test/ui/nll/issue-57989.rs Normal file
View File

@ -0,0 +1,12 @@
// Test for ICE from issue 57989
#![feature(nll)]
fn f(x: &i32) {
let g = &x;
*x = 0; //~ ERROR cannot assign to `*x` which is behind a `&` reference
//~| ERROR cannot assign to `*x` because it is borrowed
g;
}
fn main() {}

24
src/test/ui/nll/issue-57989.stderr Normal file
View File

@ -0,0 +1,24 @@
error[E0594]: cannot assign to `*x` which is behind a `&` reference
--> $DIR/issue-57989.rs:7:5
|
LL | fn f(x: &i32) {
| ---- help: consider changing this to be a mutable reference: `&mut i32`
LL | let g = &x;
LL | *x = 0; //~ ERROR cannot assign to `*x` which is behind a `&` reference
| ^^^^^^ `x` is a `&` reference, so the data it refers to cannot be written
error[E0506]: cannot assign to `*x` because it is borrowed
--> $DIR/issue-57989.rs:7:5
|
LL | let g = &x;
| -- borrow of `*x` occurs here
LL | *x = 0; //~ ERROR cannot assign to `*x` which is behind a `&` reference
| ^^^^^^ assignment to borrowed `*x` occurs here
LL | //~| ERROR cannot assign to `*x` because it is borrowed
LL | g;
| - borrow later used here
error: aborting due to 2 previous errors
Some errors occurred: E0506, E0594.
For more information about an error, try `rustc --explain E0506`.

1
src/test/ui/target-feature-gate.rs
View File

@ -22,6 +22,7 @@
// gate-test-wasm_target_feature
// gate-test-adx_target_feature
// gate-test-cmpxchg16b_target_feature
// gate-test-movbe_target_feature
// min-llvm-version 6.0
#[target_feature(enable = "avx512bw")]

2
src/test/ui/target-feature-gate.stderr
View File

@ -1,5 +1,5 @@
error[E0658]: the target feature `avx512bw` is currently unstable (see issue #44839)
--> $DIR/target-feature-gate.rs:27:18
--> $DIR/target-feature-gate.rs:28:18
|
LL | #[target_feature(enable = "avx512bw")]
| ^^^^^^^^^^^^^^^^^^^