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add rustc_dump_def_parents attribute

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This commit is contained in:
Boxy 2024-06-30 19:31:15 +01:00
parent 6c3485512f
commit 552794410a
6 changed files with 217 additions and 1 deletions
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4
compiler/rustc_feature/src/builtin_attrs.rs
View File

@ -1117,6 +1117,10 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
TEST, rustc_dump_predicates, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_dump_def_parents, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No
),
rustc_attr!(
TEST, rustc_object_lifetime_default, Normal, template!(Word),
WarnFollowing, EncodeCrossCrate::No

50
compiler/rustc_hir_analysis/src/collect/dump.rs
View File

@ -1,5 +1,7 @@
use rustc_hir::def::DefKind;
use rustc_hir::def_id::CRATE_DEF_ID;
use rustc_hir::def_id::{LocalDefId, CRATE_DEF_ID};
use rustc_hir::intravisit;
use rustc_middle::hir::nested_filter::OnlyBodies;
use rustc_middle::ty::TyCtxt;
use rustc_span::sym;
@ -41,3 +43,49 @@ pub(crate) fn predicates_and_item_bounds(tcx: TyCtxt<'_>) {
}
}
}
pub(crate) fn def_parents(tcx: TyCtxt<'_>) {
for did in tcx.hir().body_owners() {
if tcx.has_attr(did, sym::rustc_dump_def_parents) {
struct AnonConstFinder<'tcx> {
tcx: TyCtxt<'tcx>,
anon_consts: Vec<LocalDefId>,
}
impl<'tcx> intravisit::Visitor<'tcx> for AnonConstFinder<'tcx> {
type NestedFilter = OnlyBodies;
fn nested_visit_map(&mut self) -> Self::Map {
self.tcx.hir()
}
fn visit_anon_const(&mut self, c: &'tcx rustc_hir::AnonConst) {
self.anon_consts.push(c.def_id);
intravisit::walk_anon_const(self, c)
}
}
// Look for any anon consts inside of this body owner as there is no way to apply
// the `rustc_dump_def_parents` attribute to the anon const so it would not be possible
// to see what its def parent is.
let mut anon_ct_finder = AnonConstFinder { tcx, anon_consts: vec![] };
intravisit::walk_expr(&mut anon_ct_finder, tcx.hir().body_owned_by(did).value);
for did in [did].into_iter().chain(anon_ct_finder.anon_consts) {
let span = tcx.def_span(did);
let mut diag = tcx.dcx().struct_span_err(
span,
format!("{}: {did:?}", sym::rustc_dump_def_parents.as_str()),
);
let mut current_did = did.to_def_id();
while let Some(parent_did) = tcx.opt_parent(current_did) {
current_did = parent_did;
diag.span_note(tcx.def_span(parent_did), format!("{parent_did:?}"));
}
diag.emit();
}
}
}
}

1
compiler/rustc_hir_analysis/src/lib.rs
View File

@ -169,6 +169,7 @@ pub fn check_crate(tcx: TyCtxt<'_>) {
tcx.sess.time("variance_dumping", || variance::dump::variances(tcx));
collect::dump::opaque_hidden_types(tcx);
collect::dump::predicates_and_item_bounds(tcx);
collect::dump::def_parents(tcx);
}
// Make sure we evaluate all static and (non-associated) const items, even if unused.

1
compiler/rustc_span/src/symbol.rs
View File

@ -1614,6 +1614,7 @@ symbols! {
rustc_do_not_const_check,
rustc_doc_primitive,
rustc_dummy,
rustc_dump_def_parents,
rustc_dump_item_bounds,
rustc_dump_predicates,
rustc_dump_user_args,

34
tests/ui/attributes/dump_def_parents.rs Normal file
View File

@ -0,0 +1,34 @@
//@ normalize-stderr-test "DefId\(.+?\)" -> "DefId(..)"
#![feature(rustc_attrs)]
fn bar() {
fn foo() {
fn baz() {
#[rustc_dump_def_parents]
|| {
//~^ ERROR: rustc_dump_def_parents: DefId
qux::<
{
//~^ ERROR: rustc_dump_def_parents: DefId
fn inhibits_dump() {
qux::<
{
"hi";
1
},
>();
}
qux::<{ 1 + 1 }>();
//~^ ERROR: rustc_dump_def_parents: DefId
1
},
>();
};
}
}
}
const fn qux<const N: usize>() {}
fn main() {}

128
tests/ui/attributes/dump_def_parents.stderr Normal file
View File

@ -0,0 +1,128 @@
error: rustc_dump_def_parents: DefId(..)
--> $DIR/dump_def_parents.rs:8:13
|
LL | || {
| ^^
|
note: DefId(..)
--> $DIR/dump_def_parents.rs:6:9
|
LL | fn baz() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:5:5
|
LL | fn foo() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:4:1
|
LL | fn bar() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:2:1
|
LL | / #![feature(rustc_attrs)]
LL | |
LL | | fn bar() {
LL | | fn foo() {
... |
LL | |
LL | | fn main() {}
| |____________^
error: rustc_dump_def_parents: DefId(..)
--> $DIR/dump_def_parents.rs:11:21
|
LL | / {
LL | |
LL | | fn inhibits_dump() {
LL | | qux::<
... |
LL | | 1
LL | | },
| |_____________________^
|
note: DefId(..)
--> $DIR/dump_def_parents.rs:8:13
|
LL | || {
| ^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:6:9
|
LL | fn baz() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:5:5
|
LL | fn foo() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:4:1
|
LL | fn bar() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:2:1
|
LL | / #![feature(rustc_attrs)]
LL | |
LL | | fn bar() {
LL | | fn foo() {
... |
LL | |
LL | | fn main() {}
| |____________^
error: rustc_dump_def_parents: DefId(..)
--> $DIR/dump_def_parents.rs:22:31
|
LL | qux::<{ 1 + 1 }>();
| ^^^^^^^^^
|
note: DefId(..)
--> $DIR/dump_def_parents.rs:11:21
|
LL | / {
LL | |
LL | | fn inhibits_dump() {
LL | | qux::<
... |
LL | | 1
LL | | },
| |_____________________^
note: DefId(..)
--> $DIR/dump_def_parents.rs:8:13
|
LL | || {
| ^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:6:9
|
LL | fn baz() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:5:5
|
LL | fn foo() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:4:1
|
LL | fn bar() {
| ^^^^^^^^
note: DefId(..)
--> $DIR/dump_def_parents.rs:2:1
|
LL | / #![feature(rustc_attrs)]
LL | |
LL | | fn bar() {
LL | | fn foo() {
... |
LL | |
LL | | fn main() {}
| |____________^
error: aborting due to 3 previous errors