nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-11-22 06:44:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix drop shim for AsyncFnOnce closure, AsyncFnMut shim for AsyncFn closure

Browse Source
This commit is contained in:
Michael Goulet 2024-01-29 17:41:51 +00:00
parent c98d6994a3
commit ca44416023
35 changed files with 595 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
compiler/rustc_const_eval/src/interpret/terminator.rs
View File

@ -546,7 +546,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
| ty::InstanceDef::ReifyShim(..)
| ty::InstanceDef::ClosureOnceShim { .. }
| ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
| ty::InstanceDef::CoroutineByMoveShim { .. }
| ty::InstanceDef::CoroutineKindShim { .. }
| ty::InstanceDef::FnPtrShim(..)
| ty::InstanceDef::DropGlue(..)
| ty::InstanceDef::CloneShim(..)

18
compiler/rustc_middle/src/mir/mod.rs
View File

@ -265,7 +265,7 @@ pub struct CoroutineInfo<'tcx> {
/// The body of the coroutine, modified to take its upvars by move rather than by ref.
///
/// This is used by coroutine-closures, which must return a different flavor of coroutine
/// when called using `AsyncFnOnce::call_once`. It is produced by the `ByMoveBody` which
/// when called using `AsyncFnOnce::call_once`. It is produced by the `ByMoveBody` pass which
/// is run right after building the initial MIR, and will only be populated for coroutines
/// which come out of the async closure desugaring.
///
@ -274,6 +274,13 @@ pub struct CoroutineInfo<'tcx> {
/// using `run_passes`.
pub by_move_body: Option<Body<'tcx>>,
/// The body of the coroutine, modified to take its upvars by mutable ref rather than by
/// immutable ref.
///
/// FIXME(async_closures): This is literally the same body as the parent body. Find a better
/// way to represent the by-mut signature (or cap the closure-kind of the coroutine).
pub by_mut_body: Option<Body<'tcx>>,
/// The layout of a coroutine. This field is populated after the state transform pass.
pub coroutine_layout: Option<CoroutineLayout<'tcx>>,
@ -294,6 +301,7 @@ impl<'tcx> CoroutineInfo<'tcx> {
yield_ty: Some(yield_ty),
resume_ty: Some(resume_ty),
by_move_body: None,
by_mut_body: None,
coroutine_drop: None,
coroutine_layout: None,
}
@ -604,6 +612,14 @@ impl<'tcx> Body<'tcx> {
self.coroutine.as_ref().and_then(|coroutine| coroutine.coroutine_drop.as_ref())
}
pub fn coroutine_by_move_body(&self) -> Option<&Body<'tcx>> {
self.coroutine.as_ref()?.by_move_body.as_ref()
}
pub fn coroutine_by_mut_body(&self) -> Option<&Body<'tcx>> {
self.coroutine.as_ref()?.by_mut_body.as_ref()
}
#[inline]
pub fn coroutine_kind(&self) -> Option<CoroutineKind> {
self.coroutine.as_ref().map(|coroutine| coroutine.coroutine_kind)

2
compiler/rustc_middle/src/mir/mono.rs
View File

@ -403,7 +403,7 @@ impl<'tcx> CodegenUnit<'tcx> {
| InstanceDef::Virtual(..)
| InstanceDef::ClosureOnceShim { .. }
| InstanceDef::ConstructCoroutineInClosureShim { .. }
| InstanceDef::CoroutineByMoveShim { .. }
| InstanceDef::CoroutineKindShim { .. }
| InstanceDef::DropGlue(..)
| InstanceDef::CloneShim(..)
| InstanceDef::ThreadLocalShim(..)

2
compiler/rustc_middle/src/mir/visit.rs
View File

@ -346,7 +346,7 @@ macro_rules! make_mir_visitor {
ty::InstanceDef::ThreadLocalShim(_def_id) |
ty::InstanceDef::ClosureOnceShim { call_once: _def_id, track_caller: _ } |
ty::InstanceDef::ConstructCoroutineInClosureShim { coroutine_closure_def_id: _def_id, target_kind: _ } |
ty::InstanceDef::CoroutineByMoveShim { coroutine_def_id: _def_id } |
ty::InstanceDef::CoroutineKindShim { coroutine_def_id: _def_id, target_kind: _ } |
ty::InstanceDef::DropGlue(_def_id, None) => {}
ty::InstanceDef::FnPtrShim(_def_id, ty) |

26
compiler/rustc_middle/src/ty/instance.rs
View File

@ -102,10 +102,12 @@ pub enum InstanceDef<'tcx> {
},
/// `<[coroutine] as Future>::poll`, but for coroutines produced when `AsyncFnOnce`
/// is called on a coroutine-closure whose closure kind is not `FnOnce`. This
/// will select the body that is produced by the `ByMoveBody` transform, and thus
/// is called on a coroutine-closure whose closure kind greater than `FnOnce`, or
/// similarly for `AsyncFnMut`.
///
/// This will select the body that is produced by the `ByMoveBody` transform, and thus
/// take and use all of its upvars by-move rather than by-ref.
CoroutineByMoveShim { coroutine_def_id: DefId },
CoroutineKindShim { coroutine_def_id: DefId, target_kind: ty::ClosureKind },
/// Compiler-generated accessor for thread locals which returns a reference to the thread local
/// the `DefId` defines. This is used to export thread locals from dylibs on platforms lacking
@ -192,7 +194,7 @@ impl<'tcx> InstanceDef<'tcx> {
coroutine_closure_def_id: def_id,
target_kind: _,
}
| ty::InstanceDef::CoroutineByMoveShim { coroutine_def_id: def_id }
| ty::InstanceDef::CoroutineKindShim { coroutine_def_id: def_id, target_kind: _ }
| InstanceDef::DropGlue(def_id, _)
| InstanceDef::CloneShim(def_id, _)
| InstanceDef::FnPtrAddrShim(def_id, _) => def_id,
@ -213,7 +215,7 @@ impl<'tcx> InstanceDef<'tcx> {
| InstanceDef::Intrinsic(..)
| InstanceDef::ClosureOnceShim { .. }
| ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
| ty::InstanceDef::CoroutineByMoveShim { .. }
| ty::InstanceDef::CoroutineKindShim { .. }
| InstanceDef::DropGlue(..)
| InstanceDef::CloneShim(..)
| InstanceDef::FnPtrAddrShim(..) => None,
@ -310,7 +312,7 @@ impl<'tcx> InstanceDef<'tcx> {
| InstanceDef::DropGlue(_, Some(_)) => false,
InstanceDef::ClosureOnceShim { .. }
| InstanceDef::ConstructCoroutineInClosureShim { .. }
| InstanceDef::CoroutineByMoveShim { .. }
| InstanceDef::CoroutineKindShim { .. }
| InstanceDef::DropGlue(..)
| InstanceDef::Item(_)
| InstanceDef::Intrinsic(..)
@ -349,7 +351,7 @@ fn fmt_instance(
InstanceDef::FnPtrShim(_, ty) => write!(f, " - shim({ty})"),
InstanceDef::ClosureOnceShim { .. } => write!(f, " - shim"),
InstanceDef::ConstructCoroutineInClosureShim { .. } => write!(f, " - shim"),
InstanceDef::CoroutineByMoveShim { .. } => write!(f, " - shim"),
InstanceDef::CoroutineKindShim { .. } => write!(f, " - shim"),
InstanceDef::DropGlue(_, None) => write!(f, " - shim(None)"),
InstanceDef::DropGlue(_, Some(ty)) => write!(f, " - shim(Some({ty}))"),
InstanceDef::CloneShim(_, ty) => write!(f, " - shim({ty})"),
@ -651,13 +653,11 @@ impl<'tcx> Instance<'tcx> {
if args.as_coroutine().kind_ty() == id_args.as_coroutine().kind_ty() {
Some(Instance { def: ty::InstanceDef::Item(coroutine_def_id), args })
} else {
assert_eq!(
args.as_coroutine().kind_ty().to_opt_closure_kind().unwrap(),
ty::ClosureKind::FnOnce,
"FIXME(async_closures): Generate a by-mut body here."
);
Some(Instance {
def: ty::InstanceDef::CoroutineByMoveShim { coroutine_def_id },
def: ty::InstanceDef::CoroutineKindShim {
coroutine_def_id,
target_kind: args.as_coroutine().kind_ty().to_opt_closure_kind().unwrap(),
},
args,
})
}

2
compiler/rustc_middle/src/ty/mod.rs
View File

@ -1681,7 +1681,7 @@ impl<'tcx> TyCtxt<'tcx> {
| ty::InstanceDef::Virtual(..)
| ty::InstanceDef::ClosureOnceShim { .. }
| ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
| ty::InstanceDef::CoroutineByMoveShim { .. }
| ty::InstanceDef::CoroutineKindShim { .. }
| ty::InstanceDef::DropGlue(..)
| ty::InstanceDef::CloneShim(..)
| ty::InstanceDef::ThreadLocalShim(..)

21
compiler/rustc_middle/src/ty/print/mod.rs
View File

@ -3,6 +3,7 @@ use crate::ty::{self, Ty, TyCtxt};
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::sso::SsoHashSet;
use rustc_hir as hir;
use rustc_hir::def_id::{CrateNum, DefId, LocalDefId};
use rustc_hir::definitions::{DefPathData, DisambiguatedDefPathData};
@ -130,8 +131,24 @@ pub trait Printer<'tcx>: Sized {
parent_args = &args[..generics.parent_count.min(args.len())];
match key.disambiguated_data.data {
// Closures' own generics are only captures, don't print them.
DefPathData::Closure => {}
DefPathData::Closure => {
// FIXME(async_closures): This is somewhat ugly.
// We need to additionally print the `kind` field of a closure if
// it is desugared from a coroutine-closure.
if let Some(hir::CoroutineKind::Desugared(
_,
hir::CoroutineSource::Closure,
)) = self.tcx().coroutine_kind(def_id)
&& args.len() >= parent_args.len() + 1
{
return self.path_generic_args(
|cx| cx.print_def_path(def_id, parent_args),
&args[..parent_args.len() + 1][..1],
);
} else {
// Closures' own generics are only captures, don't print them.
}
}
// This covers both `DefKind::AnonConst` and `DefKind::InlineConst`.
// Anon consts doesn't have their own generics, and inline consts' own
// generics are their inferred types, so don't print them.

45
compiler/rustc_mir_transform/src/coroutine/by_move_body.rs
View File

@ -6,7 +6,7 @@
use rustc_data_structures::fx::FxIndexSet;
use rustc_hir as hir;
use rustc_middle::mir::visit::MutVisitor;
use rustc_middle::mir::{self, MirPass};
use rustc_middle::mir::{self, dump_mir, MirPass};
use rustc_middle::ty::{self, InstanceDef, Ty, TyCtxt};
use rustc_target::abi::FieldIdx;
@ -24,7 +24,9 @@ impl<'tcx> MirPass<'tcx> for ByMoveBody {
};
let coroutine_ty = body.local_decls[ty::CAPTURE_STRUCT_LOCAL].ty;
let ty::Coroutine(_, args) = *coroutine_ty.kind() else { bug!() };
if args.as_coroutine().kind_ty().to_opt_closure_kind().unwrap() == ty::ClosureKind::FnOnce {
let coroutine_kind = args.as_coroutine().kind_ty().to_opt_closure_kind().unwrap();
if coroutine_kind == ty::ClosureKind::FnOnce {
return;
}
@ -58,14 +60,49 @@ impl<'tcx> MirPass<'tcx> for ByMoveBody {
let mut by_move_body = body.clone();
MakeByMoveBody { tcx, by_ref_fields, by_move_coroutine_ty }.visit_body(&mut by_move_body);
dump_mir(tcx, false, "coroutine_by_move", &0, &by_move_body, |_, _| Ok(()));
by_move_body.source = mir::MirSource {
instance: InstanceDef::CoroutineByMoveShim {
instance: InstanceDef::CoroutineKindShim {
coroutine_def_id: coroutine_def_id.to_def_id(),
target_kind: ty::ClosureKind::FnOnce,
},
promoted: None,
};
body.coroutine.as_mut().unwrap().by_move_body = Some(by_move_body);
// If this is coming from an `AsyncFn` coroutine-closure, we must also create a by-mut body.
// This is actually just a copy of the by-ref body, but with a different self type.
// FIXME(async_closures): We could probably unify this with the by-ref body somehow.
if coroutine_kind == ty::ClosureKind::Fn {
let by_mut_coroutine_ty = Ty::new_coroutine(
tcx,
coroutine_def_id.to_def_id(),
ty::CoroutineArgs::new(
tcx,
ty::CoroutineArgsParts {
parent_args: args.as_coroutine().parent_args(),
kind_ty: Ty::from_closure_kind(tcx, ty::ClosureKind::FnMut),
resume_ty: args.as_coroutine().resume_ty(),
yield_ty: args.as_coroutine().yield_ty(),
return_ty: args.as_coroutine().return_ty(),
witness: args.as_coroutine().witness(),
tupled_upvars_ty: args.as_coroutine().tupled_upvars_ty(),
},
)
.args,
);
let mut by_mut_body = body.clone();
by_mut_body.local_decls[ty::CAPTURE_STRUCT_LOCAL].ty = by_mut_coroutine_ty;
dump_mir(tcx, false, "coroutine_by_mut", &0, &by_mut_body, |_, _| Ok(()));
by_mut_body.source = mir::MirSource {
instance: InstanceDef::CoroutineKindShim {
coroutine_def_id: coroutine_def_id.to_def_id(),
target_kind: ty::ClosureKind::FnMut,
},
promoted: None,
};
body.coroutine.as_mut().unwrap().by_mut_body = Some(by_mut_body);
}
}
}

2
compiler/rustc_mir_transform/src/inline.rs
View File

@ -318,7 +318,7 @@ impl<'tcx> Inliner<'tcx> {
| InstanceDef::FnPtrShim(..)
| InstanceDef::ClosureOnceShim { .. }
| InstanceDef::ConstructCoroutineInClosureShim { .. }
| InstanceDef::CoroutineByMoveShim { .. }
| InstanceDef::CoroutineKindShim { .. }
| InstanceDef::DropGlue(..)
| InstanceDef::CloneShim(..)
| InstanceDef::ThreadLocalShim(..)

2
compiler/rustc_mir_transform/src/inline/cycle.rs
View File

@ -88,7 +88,7 @@ pub(crate) fn mir_callgraph_reachable<'tcx>(
| InstanceDef::FnPtrShim(..)
| InstanceDef::ClosureOnceShim { .. }
| InstanceDef::ConstructCoroutineInClosureShim { .. }
| InstanceDef::CoroutineByMoveShim { .. }
| InstanceDef::CoroutineKindShim { .. }
| InstanceDef::ThreadLocalShim { .. }
| InstanceDef::CloneShim(..) => {}

11
compiler/rustc_mir_transform/src/pass_manager.rs
View File

@ -190,10 +190,13 @@ fn run_passes_inner<'tcx>(
body.pass_count = 1;
}
if let Some(coroutine) = body.coroutine.as_mut()
&& let Some(by_move_body) = coroutine.by_move_body.as_mut()
{
run_passes_inner(tcx, by_move_body, passes, phase_change, validate_each);
if let Some(coroutine) = body.coroutine.as_mut() {
if let Some(by_move_body) = coroutine.by_move_body.as_mut() {
run_passes_inner(tcx, by_move_body, passes, phase_change, validate_each);
}
if let Some(by_mut_body) = coroutine.by_mut_body.as_mut() {
run_passes_inner(tcx, by_mut_body, passes, phase_change, validate_each);
}
}
}

77
compiler/rustc_mir_transform/src/shim.rs
View File

@ -72,32 +72,70 @@ fn make_shim<'tcx>(tcx: TyCtxt<'tcx>, instance: ty::InstanceDef<'tcx>) -> Body<'
} => match target_kind {
ty::ClosureKind::Fn => unreachable!("shouldn't be building shim for Fn"),
ty::ClosureKind::FnMut => {
let body = build_construct_coroutine_by_mut_shim(tcx, coroutine_closure_def_id);
// No need to optimize the body, it has already been optimized.
return body;
// No need to optimize the body, it has already been optimized
// since we steal it from the `AsyncFn::call` body and just fix
// the return type.
return build_construct_coroutine_by_mut_shim(tcx, coroutine_closure_def_id);
}
ty::ClosureKind::FnOnce => {
build_construct_coroutine_by_move_shim(tcx, coroutine_closure_def_id)
}
},
ty::InstanceDef::CoroutineByMoveShim { coroutine_def_id } => {
return tcx
.optimized_mir(coroutine_def_id)
.coroutine
.as_ref()
.unwrap()
.by_move_body
.as_ref()
.unwrap()
.clone();
}
ty::InstanceDef::CoroutineKindShim { coroutine_def_id, target_kind } => match target_kind {
ty::ClosureKind::Fn => unreachable!(),
ty::ClosureKind::FnMut => {
return tcx
.optimized_mir(coroutine_def_id)
.coroutine_by_mut_body()
.unwrap()
.clone();
}
ty::ClosureKind::FnOnce => {
return tcx
.optimized_mir(coroutine_def_id)
.coroutine_by_move_body()
.unwrap()
.clone();
}
},
ty::InstanceDef::DropGlue(def_id, ty) => {
// FIXME(#91576): Drop shims for coroutines aren't subject to the MIR passes at the end
// of this function. Is this intentional?
if let Some(ty::Coroutine(coroutine_def_id, args)) = ty.map(Ty::kind) {
let body = tcx.optimized_mir(*coroutine_def_id).coroutine_drop().unwrap();
let coroutine_body = tcx.optimized_mir(*coroutine_def_id);
let ty::Coroutine(_, id_args) = *tcx.type_of(coroutine_def_id).skip_binder().kind()
else {
bug!()
};
// If this is a regular coroutine, grab its drop shim. If this is a coroutine
// that comes from a coroutine-closure, and the kind ty differs from the "maximum"
// kind that it supports, then grab the appropriate drop shim. This ensures that
// the future returned by `<[coroutine-closure] as AsyncFnOnce>::call_once` will
// drop the coroutine-closure's upvars.
let body = if id_args.as_coroutine().kind_ty() == args.as_coroutine().kind_ty() {
coroutine_body.coroutine_drop().unwrap()
} else {
match args.as_coroutine().kind_ty().to_opt_closure_kind().unwrap() {
ty::ClosureKind::Fn => {
unreachable!()
}
ty::ClosureKind::FnMut => coroutine_body
.coroutine_by_mut_body()
.unwrap()
.coroutine_drop()
.unwrap(),
ty::ClosureKind::FnOnce => coroutine_body
.coroutine_by_move_body()
.unwrap()
.coroutine_drop()
.unwrap(),
}
};
let mut body = EarlyBinder::bind(body.clone()).instantiate(tcx, args);
debug!("make_shim({:?}) = {:?}", instance, body);
@ -1076,7 +1114,11 @@ fn build_construct_coroutine_by_move_shim<'tcx>(
target_kind: ty::ClosureKind::FnOnce,
});
new_body(source, IndexVec::from_elem_n(start_block, 1), locals, sig.inputs().len(), span)
let body =
new_body(source, IndexVec::from_elem_n(start_block, 1), locals, sig.inputs().len(), span);
dump_mir(tcx, false, "coroutine_closure_by_move", &0, &body, |_, _| Ok(()));
body
}
fn build_construct_coroutine_by_mut_shim<'tcx>(
@ -1110,5 +1152,8 @@ fn build_construct_coroutine_by_mut_shim<'tcx>(
target_kind: ty::ClosureKind::FnMut,
});
body.pass_count = 0;
dump_mir(tcx, false, "coroutine_closure_by_mut", &0, &body, |_, _| Ok(()));
body
}

2
compiler/rustc_monomorphize/src/collector.rs
View File

@ -984,7 +984,7 @@ fn visit_instance_use<'tcx>(
| ty::InstanceDef::ReifyShim(..)
| ty::InstanceDef::ClosureOnceShim { .. }
| ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
| ty::InstanceDef::CoroutineByMoveShim { .. }
| ty::InstanceDef::CoroutineKindShim { .. }
| ty::InstanceDef::Item(..)
| ty::InstanceDef::FnPtrShim(..)
| ty::InstanceDef::CloneShim(..)

4
compiler/rustc_monomorphize/src/partitioning.rs
View File

@ -621,7 +621,7 @@ fn characteristic_def_id_of_mono_item<'tcx>(
| ty::InstanceDef::FnPtrShim(..)
| ty::InstanceDef::ClosureOnceShim { .. }
| ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
| ty::InstanceDef::CoroutineByMoveShim { .. }
| ty::InstanceDef::CoroutineKindShim { .. }
| ty::InstanceDef::Intrinsic(..)
| ty::InstanceDef::DropGlue(..)
| ty::InstanceDef::Virtual(..)
@ -786,7 +786,7 @@ fn mono_item_visibility<'tcx>(
| InstanceDef::Intrinsic(..)
| InstanceDef::ClosureOnceShim { .. }
| InstanceDef::ConstructCoroutineInClosureShim { .. }
| InstanceDef::CoroutineByMoveShim { .. }
| InstanceDef::CoroutineKindShim { .. }
| InstanceDef::DropGlue(..)
| InstanceDef::CloneShim(..)
| InstanceDef::FnPtrAddrShim(..) => return Visibility::Hidden,

2
compiler/rustc_smir/src/rustc_smir/convert/ty.rs
View File

@ -800,7 +800,7 @@ impl<'tcx> Stable<'tcx> for ty::Instance<'tcx> {
| ty::InstanceDef::FnPtrAddrShim(..)
| ty::InstanceDef::ClosureOnceShim { .. }
| ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
| ty::InstanceDef::CoroutineByMoveShim { .. }
| ty::InstanceDef::CoroutineKindShim { .. }
| ty::InstanceDef::ThreadLocalShim(..)
| ty::InstanceDef::DropGlue(..)
| ty::InstanceDef::CloneShim(..)

33
compiler/rustc_symbol_mangling/src/legacy.rs
View File

@ -64,16 +64,29 @@ pub(super) fn mangle<'tcx>(
)
.unwrap();
if let ty::InstanceDef::ThreadLocalShim(..) = instance.def {
let _ = printer.write_str("{{tls-shim}}");
}
if let ty::InstanceDef::VTableShim(..) = instance.def {
let _ = printer.write_str("{{vtable-shim}}");
}
if let ty::InstanceDef::ReifyShim(..) = instance.def {
let _ = printer.write_str("{{reify-shim}}");
match instance.def {
ty::InstanceDef::ThreadLocalShim(..) => {
printer.write_str("{{tls-shim}}").unwrap();
}
ty::InstanceDef::VTableShim(..) => {
printer.write_str("{{vtable-shim}}").unwrap();
}
ty::InstanceDef::ReifyShim(..) => {
printer.write_str("{{reify-shim}}").unwrap();
}
// FIXME(async_closures): This shouldn't be needed when we fix
// `Instance::ty`/`Instance::def_id`.
ty::InstanceDef::ConstructCoroutineInClosureShim { target_kind, .. }
| ty::InstanceDef::CoroutineKindShim { target_kind, .. } => match target_kind {
ty::ClosureKind::Fn => unreachable!(),
ty::ClosureKind::FnMut => {
printer.write_str("{{fn-mut-shim}}").unwrap();
}
ty::ClosureKind::FnOnce => {
printer.write_str("{{fn-once-shim}}").unwrap();
}
},
_ => {}
}
printer.path.finish(hash)

7
compiler/rustc_symbol_mangling/src/v0.rs
View File

@ -46,6 +46,13 @@ pub(super) fn mangle<'tcx>(
ty::InstanceDef::VTableShim(_) => Some("vtable"),
ty::InstanceDef::ReifyShim(_) => Some("reify"),
ty::InstanceDef::ConstructCoroutineInClosureShim { target_kind, .. }
| ty::InstanceDef::CoroutineKindShim { target_kind, .. } => match target_kind {
ty::ClosureKind::Fn => unreachable!(),
ty::ClosureKind::FnMut => Some("fn_mut"),
ty::ClosureKind::FnOnce => Some("fn_once"),
},
_ => None,
};

2
compiler/rustc_ty_utils/src/abi.rs
View File

@ -145,7 +145,7 @@ fn fn_sig_for_fn_abi<'tcx>(
)
}
ty::Coroutine(did, args) => {
// FIXME(async_closures): This isn't right for `CoroutineByMoveShim`.
// FIXME(async_closures): This isn't right for `CoroutineKindShim`.
let coroutine_kind = tcx.coroutine_kind(did).unwrap();
let sig = args.as_coroutine().sig();

47
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}-{closure#0}.coroutine_by_move.0.panic-abort.mir Normal file
View File

@ -0,0 +1,47 @@
// MIR for `main::{closure#0}::{closure#0}::{closure#0}` 0 coroutine_by_move
fn main::{closure#0}::{closure#0}::{closure#0}(_1: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10}, _2: ResumeTy) -> ()
yields ()
{
debug _task_context => _2;
debug a => (_1.0: i32);
debug b => (_1.1: i32);
let mut _0: ();
let _3: i32;
scope 1 {
debug a => _3;
let _4: &i32;
scope 2 {
debug a => _4;
let _5: &i32;
scope 3 {
debug b => _5;
}
}
}
bb0: {
StorageLive(_3);
_3 = (_1.0: i32);
FakeRead(ForLet(None), _3);
StorageLive(_4);
_4 = &_3;
FakeRead(ForLet(None), _4);
StorageLive(_5);
_5 = &(_1.1: i32);
FakeRead(ForLet(None), _5);
_0 = const ();
StorageDead(_5);
StorageDead(_4);
StorageDead(_3);
drop(_1) -> [return: bb1, unwind: bb2];
}
bb1: {
return;
}
bb2 (cleanup): {
resume;
}
}

47
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}-{closure#0}.coroutine_by_move.0.panic-unwind.mir Normal file
View File

@ -0,0 +1,47 @@
// MIR for `main::{closure#0}::{closure#0}::{closure#0}` 0 coroutine_by_move
fn main::{closure#0}::{closure#0}::{closure#0}(_1: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10}, _2: ResumeTy) -> ()
yields ()
{
debug _task_context => _2;
debug a => (_1.0: i32);
debug b => (_1.1: i32);
let mut _0: ();
let _3: i32;
scope 1 {
debug a => _3;
let _4: &i32;
scope 2 {
debug a => _4;
let _5: &i32;
scope 3 {
debug b => _5;
}
}
}
bb0: {
StorageLive(_3);
_3 = (_1.0: i32);
FakeRead(ForLet(None), _3);
StorageLive(_4);
_4 = &_3;
FakeRead(ForLet(None), _4);
StorageLive(_5);
_5 = &(_1.1: i32);
FakeRead(ForLet(None), _5);
_0 = const ();
StorageDead(_5);
StorageDead(_4);
StorageDead(_3);
drop(_1) -> [return: bb1, unwind: bb2];
}
bb1: {
return;
}
bb2 (cleanup): {
resume;
}
}

47
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}-{closure#0}.coroutine_by_mut.0.panic-abort.mir Normal file
View File

@ -0,0 +1,47 @@
// MIR for `main::{closure#0}::{closure#0}::{closure#0}` 0 coroutine_by_mut
fn main::{closure#0}::{closure#0}::{closure#0}(_1: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10}, _2: ResumeTy) -> ()
yields ()
{
debug _task_context => _2;
debug a => (_1.0: i32);
debug b => (*(_1.1: &i32));
let mut _0: ();
let _3: i32;
scope 1 {
debug a => _3;
let _4: &i32;
scope 2 {
debug a => _4;
let _5: &i32;
scope 3 {
debug b => _5;
}
}
}
bb0: {
StorageLive(_3);
_3 = (_1.0: i32);
FakeRead(ForLet(None), _3);
StorageLive(_4);
_4 = &_3;
FakeRead(ForLet(None), _4);
StorageLive(_5);
_5 = &(*(_1.1: &i32));
FakeRead(ForLet(None), _5);
_0 = const ();
StorageDead(_5);
StorageDead(_4);
StorageDead(_3);
drop(_1) -> [return: bb1, unwind: bb2];
}
bb1: {
return;
}
bb2 (cleanup): {
resume;
}
}

47
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}-{closure#0}.coroutine_by_mut.0.panic-unwind.mir Normal file
View File

@ -0,0 +1,47 @@
// MIR for `main::{closure#0}::{closure#0}::{closure#0}` 0 coroutine_by_mut
fn main::{closure#0}::{closure#0}::{closure#0}(_1: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10}, _2: ResumeTy) -> ()
yields ()
{
debug _task_context => _2;
debug a => (_1.0: i32);
debug b => (*(_1.1: &i32));
let mut _0: ();
let _3: i32;
scope 1 {
debug a => _3;
let _4: &i32;
scope 2 {
debug a => _4;
let _5: &i32;
scope 3 {
debug b => _5;
}
}
}
bb0: {
StorageLive(_3);
_3 = (_1.0: i32);
FakeRead(ForLet(None), _3);
StorageLive(_4);
_4 = &_3;
FakeRead(ForLet(None), _4);
StorageLive(_5);
_5 = &(*(_1.1: &i32));
FakeRead(ForLet(None), _5);
_0 = const ();
StorageDead(_5);
StorageDead(_4);
StorageDead(_3);
drop(_1) -> [return: bb1, unwind: bb2];
}
bb1: {
return;
}
bb2 (cleanup): {
resume;
}
}

10
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_move.0.panic-abort.mir Normal file
View File

@ -0,0 +1,10 @@
// MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_move
fn main::{closure#0}::{closure#0}(_1: {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};
bb0: {
_0 = {coroutine@$DIR/async_closure_shims.rs:39:53: 42:10 (#0)} { a: move _2, b: move (_1.0: i32) };
return;
}
}

10
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_move.0.panic-unwind.mir Normal file
View File

@ -0,0 +1,10 @@
// MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_move
fn main::{closure#0}::{closure#0}(_1: {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};
bb0: {
_0 = {coroutine@$DIR/async_closure_shims.rs:39:53: 42:10 (#0)} { a: move _2, b: move (_1.0: i32) };
return;
}
}

16
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_mut.0.panic-abort.mir Normal file
View File

@ -0,0 +1,16 @@
// MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_mut
fn main::{closure#0}::{closure#0}(_1: &mut {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
debug a => _2;
debug b => ((*_1).0: i32);
let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};
let mut _3: &i32;
bb0: {
StorageLive(_3);
_3 = &((*_1).0: i32);
_0 = {coroutine@$DIR/async_closure_shims.rs:39:53: 42:10 (#0)} { a: _2, b: move _3 };
StorageDead(_3);
return;
}
}

16
tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_mut.0.panic-unwind.mir Normal file
View File

@ -0,0 +1,16 @@
// MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_mut
fn main::{closure#0}::{closure#0}(_1: &mut {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
debug a => _2;
debug b => ((*_1).0: i32);
let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};
let mut _3: &i32;
bb0: {
StorageLive(_3);
_3 = &((*_1).0: i32);
_0 = {coroutine@$DIR/async_closure_shims.rs:39:53: 42:10 (#0)} { a: _2, b: move _3 };
StorageDead(_3);
return;
}
}

46
tests/mir-opt/async_closure_shims.rs Normal file
View File

@ -0,0 +1,46 @@
// edition:2021
// skip-filecheck
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
#![feature(async_closure, noop_waker, async_fn_traits)]
use std::future::Future;
use std::ops::{AsyncFnMut, AsyncFnOnce};
use std::pin::pin;
use std::task::*;
pub fn block_on<T>(fut: impl Future<Output = T>) -> T {
let mut fut = pin!(fut);
let ctx = &mut Context::from_waker(Waker::noop());
loop {
match fut.as_mut().poll(ctx) {
Poll::Pending => {}
Poll::Ready(t) => break t,
}
}
}
async fn call_mut(f: &mut impl AsyncFnMut(i32)) {
f(0).await;
}
async fn call_once(f: impl AsyncFnOnce(i32)) {
f(1).await;
}
// EMIT_MIR async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_move.0.mir
// EMIT_MIR async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_mut.0.mir
// EMIT_MIR async_closure_shims.main-{closure#0}-{closure#0}-{closure#0}.coroutine_by_mut.0.mir
// EMIT_MIR async_closure_shims.main-{closure#0}-{closure#0}-{closure#0}.coroutine_by_move.0.mir
fn main() {
block_on(async {
let b = 2i32;
let mut async_closure = async move |a: i32| {
let a = &a;
let b = &b;
};
call_mut(&mut async_closure).await;
call_once(async_closure).await;
});
}

23
tests/ui/async-await/async-closures/async-fn-mut-for-async-fn.rs Normal file
View File

@ -0,0 +1,23 @@
// aux-build:block-on.rs
// edition:2021
// run-pass
// FIXME(async_closures): When `fn_sig_for_fn_abi` is fixed, remove this.
// ignore-pass (test emits codegen-time warnings)
#![feature(async_closure, async_fn_traits)]
extern crate block_on;
use std::ops::AsyncFnMut;
fn main() {
block_on::block_on(async {
let x = async || {};
async fn needs_async_fn_mut(mut x: impl AsyncFnMut()) {
x().await;
}
needs_async_fn_mut(x).await;
});
}

1
tests/ui/async-await/async-closures/async-fn-mut-for-async-fn.stderr Normal file
View File

@ -0,0 +1 @@
WARN rustc_codegen_ssa::mir::locals Unexpected initial operand type: expected std::pin::Pin<&ReErased mut Coroutine(DefId(0:8 ~ async_fn_mut_for_async_fn[3241]::main::{closure#0}::{closure#0}::{closure#0}), [i16, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_mut_for_async_fn[3241]::main::{closure#0}::{closure#0}::{closure#0}), []), ()])>, found std::pin::Pin<&ReErased mut Coroutine(DefId(0:8 ~ async_fn_mut_for_async_fn[3241]::main::{closure#0}::{closure#0}::{closure#0}), [i8, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_mut_for_async_fn[3241]::main::{closure#0}::{closure#0}::{closure#0}), []), ()])>.See <https://github.com/rust-lang/rust/issues/114858>.

3
tests/ui/async-await/async-closures/async-fn-once-for-async-fn.stderr
View File

@ -1,2 +1 @@
WARN rustc_codegen_ssa::mir::locals Unexpected initial operand type: expected std::pin::Pin<&ReErased mut Coroutine(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), [i32, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), []), ()])>, found std::pin::Pin<&ReErased mut Coroutine(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), [i8, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), []), ()])>.See <https://github.com/rust-lang/rust/issues/114858>.
WARN rustc_codegen_ssa::mir::locals Unexpected initial operand type: expected *mut Coroutine(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), [i8, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), []), ()]), found *mut Coroutine(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), [i32, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#1}), []), ()]).See <https://github.com/rust-lang/rust/issues/114858>.
WARN rustc_codegen_ssa::mir::locals Unexpected initial operand type: expected std::pin::Pin<&ReErased mut Coroutine(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#0}::{closure#0}), [i32, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#0}::{closure#0}), []), ()])>, found std::pin::Pin<&ReErased mut Coroutine(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#0}::{closure#0}), [i8, std::future::ResumeTy, (), (), CoroutineWitness(DefId(0:8 ~ async_fn_once_for_async_fn[6cdf]::main::{closure#0}::{closure#0}::{closure#0}), []), ()])>.See <https://github.com/rust-lang/rust/issues/114858>.

4
tests/ui/async-await/async-closures/def-path.rs
View File

@ -8,7 +8,7 @@ fn main() {
//~^ NOTE the expected `async` closure body
let () = x();
//~^ ERROR mismatched types
//~| NOTE this expression has type `{static main::{closure#0}::{closure#0} upvar_tys=
//~| NOTE this expression has type `{static main::{closure#0}::{closure#0}<
//~| NOTE expected `async` closure body, found `()`
//~| NOTE expected `async` closure body `{static main::{closure#0}::{closure#0}
//~| NOTE expected `async` closure body `{static main::{closure#0}::{closure#0}<
}

4
tests/ui/async-await/async-closures/def-path.stderr
View File

@ -5,11 +5,11 @@ LL | let x = async || {};
| -- the expected `async` closure body
LL |
LL | let () = x();
| ^^ --- this expression has type `{static main::{closure#0}::{closure#0} upvar_tys=?7t witness=?8t}`
| ^^ --- this expression has type `{static main::{closure#0}::{closure#0}<?7t> upvar_tys=?15t witness=?6t}`
| |
| expected `async` closure body, found `()`
|
= note: expected `async` closure body `{static main::{closure#0}::{closure#0} upvar_tys=?7t witness=?8t}`
= note: expected `async` closure body `{static main::{closure#0}::{closure#0}<?7t> upvar_tys=?15t witness=?6t}`
found unit type `()`
error: aborting due to 1 previous error

40
tests/ui/async-await/async-closures/drop.rs Normal file
View File

@ -0,0 +1,40 @@
// aux-build:block-on.rs
// edition:2018
// run-pass
// check-run-results
#![feature(async_closure, async_fn_traits)]
#![allow(unused)]
extern crate block_on;
use std::ops::AsyncFnOnce;
struct DropMe(i32);
impl Drop for DropMe {
fn drop(&mut self) {
println!("{} was dropped", self.0);
}
}
async fn call_once(f: impl AsyncFnOnce()) {
println!("before call");
let fut = Box::pin(f());
println!("after call");
drop(fut);
println!("future dropped");
}
fn main() {
block_on::block_on(async {
let d = DropMe(42);
let async_closure = async move || {
let d = &d;
println!("called");
};
call_once(async_closure).await;
println!("after");
});
}

5
tests/ui/async-await/async-closures/drop.run.stdout Normal file
View File

@ -0,0 +1,5 @@
before call
after call
42 was dropped
future dropped
after

36
tests/ui/async-await/async-closures/mangle.rs Normal file
View File

@ -0,0 +1,36 @@
// aux-build:block-on.rs
// edition:2021
// build-pass
// revisions: v0 legacy
//[v0] compile-flags: -Csymbol-mangling-version=v0
//[legacy] compile-flags: -Csymbol-mangling-version=legacy -Zunstable-options
// FIXME(async_closures): When `fn_sig_for_fn_abi` is fixed, remove this.
// ignore-pass (test emits codegen-time warnings)
#![feature(async_closure, noop_waker, async_fn_traits)]
extern crate block_on;
use std::future::Future;
use std::ops::{AsyncFnMut, AsyncFnOnce};
use std::pin::pin;
use std::task::*;
async fn call_mut(f: &mut impl AsyncFnMut()) {
f().await;
}
async fn call_once(f: impl AsyncFnOnce()) {
f().await;
}
fn main() {
block_on::block_on(async {
let mut async_closure = async move || {
println!("called");
};
call_mut(&mut async_closure).await;
call_once(async_closure).await;
});
}