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Auto merge of #122156 - Zoxc:side-effect-dep-node, r=oli-obk

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Represent diagnostic side effects as dep nodes

This changes diagnostic to be tracked as a special dep node (`SideEffect`) instead of having a list of side effects associated with each dep node. `SideEffect` is always red and when forced, it emits the diagnostic and marks itself green. Each emitted diagnostic generates a new `SideEffect` with an unique dep node index.

Some implications of this:

- Diagnostic may now be emitted more than once as they can be emitted once when the `SideEffect` gets marked green and again if the task it depends on needs to be re-executed due to another node being red. It relies on deduplicating of diagnostics to avoid that.

- Anon tasks which emits diagnostics will no longer *incorrectly* be merged with other anon tasks.

- Reusing a CGU will now emit diagnostics from the task generating it.
This commit is contained in:
bors 2025-03-19 15:51:54 +00:00
commit 1aeb99d248
12 changed files with 185 additions and 206 deletions
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5
compiler/rustc_interface/src/callbacks.rs
View file

@ -14,6 +14,7 @@ use std::fmt;
use rustc_errors::{DiagInner, TRACK_DIAGNOSTIC};
use rustc_middle::dep_graph::{DepNodeExt, TaskDepsRef};
use rustc_middle::ty::tls;
use rustc_query_impl::QueryCtxt;
use rustc_query_system::dep_graph::dep_node::default_dep_kind_debug;
use rustc_query_system::dep_graph::{DepContext, DepKind, DepNode};
@ -41,9 +42,7 @@ fn track_span_parent(def_id: rustc_span::def_id::LocalDefId) {
fn track_diagnostic<R>(diagnostic: DiagInner, f: &mut dyn FnMut(DiagInner) -> R) -> R {
tls::with_context_opt(|icx| {
if let Some(icx) = icx {
if let Some(diagnostics) = icx.diagnostics {
diagnostics.lock().extend(Some(diagnostic.clone()));
}
icx.tcx.dep_graph.record_diagnostic(QueryCtxt::new(icx.tcx), &diagnostic);
// Diagnostics are tracked, we can ignore the dependency.
let icx = tls::ImplicitCtxt { task_deps: TaskDepsRef::Ignore, ..icx.clone() };

1
compiler/rustc_middle/src/dep_graph/dep_node.rs
View file

@ -79,6 +79,7 @@ rustc_query_append!(define_dep_nodes![
[] fn Null() -> (),
/// We use this to create a forever-red node.
[] fn Red() -> (),
[] fn SideEffect() -> (),
[] fn TraitSelect() -> (),
[] fn CompileCodegenUnit() -> (),
[] fn CompileMonoItem() -> (),

1
compiler/rustc_middle/src/dep_graph/mod.rs
View file

@ -46,6 +46,7 @@ impl Deps for DepsType {
const DEP_KIND_NULL: DepKind = dep_kinds::Null;
const DEP_KIND_RED: DepKind = dep_kinds::Red;
const DEP_KIND_SIDE_EFFECT: DepKind = dep_kinds::SideEffect;
const DEP_KIND_MAX: u16 = dep_node::DEP_KIND_VARIANTS - 1;
}

46
compiler/rustc_middle/src/query/on_disk_cache.rs
View file

@ -11,7 +11,7 @@ use rustc_hir::def_id::{CrateNum, DefId, DefIndex, LOCAL_CRATE, LocalDefId, Stab
use rustc_hir::definitions::DefPathHash;
use rustc_index::{Idx, IndexVec};
use rustc_macros::{Decodable, Encodable};
use rustc_query_system::query::QuerySideEffects;
use rustc_query_system::query::QuerySideEffect;
use rustc_serialize::opaque::{FileEncodeResult, FileEncoder, IntEncodedWithFixedSize, MemDecoder};
use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
use rustc_session::Session;
@ -55,9 +55,9 @@ pub struct OnDiskCache {
// The complete cache data in serialized form.
serialized_data: RwLock<Option<Mmap>>,
// Collects all `QuerySideEffects` created during the current compilation
// Collects all `QuerySideEffect` created during the current compilation
// session.
current_side_effects: Lock<FxHashMap<DepNodeIndex, QuerySideEffects>>,
current_side_effects: Lock<FxHashMap<DepNodeIndex, QuerySideEffect>>,
file_index_to_stable_id: FxHashMap<SourceFileIndex, EncodedSourceFileId>,
@ -68,7 +68,7 @@ pub struct OnDiskCache {
// `serialized_data`.
query_result_index: FxHashMap<SerializedDepNodeIndex, AbsoluteBytePos>,
// A map from dep-node to the position of any associated `QuerySideEffects` in
// A map from dep-node to the position of any associated `QuerySideEffect` in
// `serialized_data`.
prev_side_effects_index: FxHashMap<SerializedDepNodeIndex, AbsoluteBytePos>,
@ -270,10 +270,10 @@ impl OnDiskCache {
.current_side_effects
.borrow()
.iter()
.map(|(dep_node_index, side_effects)| {
.map(|(dep_node_index, side_effect)| {
let pos = AbsoluteBytePos::new(encoder.position());
let dep_node_index = SerializedDepNodeIndex::new(dep_node_index.index());
encoder.encode_tagged(dep_node_index, side_effects);
encoder.encode_tagged(dep_node_index, side_effect);
(dep_node_index, pos)
})
@ -352,24 +352,23 @@ impl OnDiskCache {
})
}
/// Loads a `QuerySideEffects` created during the previous compilation session.
pub fn load_side_effects(
/// Loads a `QuerySideEffect` created during the previous compilation session.
pub fn load_side_effect(
&self,
tcx: TyCtxt<'_>,
dep_node_index: SerializedDepNodeIndex,
) -> QuerySideEffects {
let side_effects: Option<QuerySideEffects> =
) -> Option<QuerySideEffect> {
let side_effect: Option<QuerySideEffect> =
self.load_indexed(tcx, dep_node_index, &self.prev_side_effects_index);
side_effects.unwrap_or_default()
side_effect
}
/// Stores a `QuerySideEffects` emitted during the current compilation session.
/// Anything stored like this will be available via `load_side_effects` in
/// Stores a `QuerySideEffect` emitted during the current compilation session.
/// Anything stored like this will be available via `load_side_effect` in
/// the next compilation session.
pub fn store_side_effects(&self, dep_node_index: DepNodeIndex, side_effects: QuerySideEffects) {
pub fn store_side_effect(&self, dep_node_index: DepNodeIndex, side_effect: QuerySideEffect) {
let mut current_side_effects = self.current_side_effects.borrow_mut();
let prev = current_side_effects.insert(dep_node_index, side_effects);
let prev = current_side_effects.insert(dep_node_index, side_effect);
debug_assert!(prev.is_none());
}
@ -395,21 +394,6 @@ impl OnDiskCache {
opt_value
}
/// Stores side effect emitted during computation of an anonymous query.
/// Since many anonymous queries can share the same `DepNode`, we aggregate
/// them -- as opposed to regular queries where we assume that there is a
/// 1:1 relationship between query-key and `DepNode`.
pub fn store_side_effects_for_anon_node(
&self,
dep_node_index: DepNodeIndex,
side_effects: QuerySideEffects,
) {
let mut current_side_effects = self.current_side_effects.borrow_mut();
let x = current_side_effects.entry(dep_node_index).or_default();
x.append(side_effects);
}
fn load_indexed<'tcx, T>(
&self,
tcx: TyCtxt<'tcx>,

16
compiler/rustc_middle/src/ty/context/tls.rs
View file

@ -1,8 +1,6 @@
use std::{mem, ptr};
use rustc_data_structures::sync::{self, Lock};
use rustc_errors::DiagInner;
use thin_vec::ThinVec;
use rustc_data_structures::sync;
use super::{GlobalCtxt, TyCtxt};
use crate::dep_graph::TaskDepsRef;
@ -22,10 +20,6 @@ pub struct ImplicitCtxt<'a, 'tcx> {
/// `ty::query::plumbing` when executing a query.
pub query: Option<QueryJobId>,
/// Where to store diagnostics for the current query job, if any.
/// This is updated by `JobOwner::start` in `ty::query::plumbing` when executing a query.
pub diagnostics: Option<&'a Lock<ThinVec<DiagInner>>>,
/// Used to prevent queries from calling too deeply.
pub query_depth: usize,
@ -37,13 +31,7 @@ pub struct ImplicitCtxt<'a, 'tcx> {
impl<'a, 'tcx> ImplicitCtxt<'a, 'tcx> {
pub fn new(gcx: &'tcx GlobalCtxt<'tcx>) -> Self {
let tcx = TyCtxt { gcx };
ImplicitCtxt {
tcx,
query: None,
diagnostics: None,
query_depth: 0,
task_deps: TaskDepsRef::Ignore,
}
ImplicitCtxt { tcx, query: None, query_depth: 0, task_deps: TaskDepsRef::Ignore }
}
}

54
compiler/rustc_query_impl/src/plumbing.rs
View file

@ -5,9 +5,7 @@
use std::num::NonZero;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::sync::Lock;
use rustc_data_structures::unord::UnordMap;
use rustc_errors::DiagInner;
use rustc_hashes::Hash64;
use rustc_index::Idx;
use rustc_middle::bug;
@ -26,14 +24,13 @@ use rustc_middle::ty::{self, TyCtxt};
use rustc_query_system::dep_graph::{DepNodeParams, HasDepContext};
use rustc_query_system::ich::StableHashingContext;
use rustc_query_system::query::{
QueryCache, QueryConfig, QueryContext, QueryJobId, QueryMap, QuerySideEffects, QueryStackFrame,
QueryCache, QueryConfig, QueryContext, QueryJobId, QueryMap, QuerySideEffect, QueryStackFrame,
force_query,
};
use rustc_query_system::{QueryOverflow, QueryOverflowNote};
use rustc_serialize::{Decodable, Encodable};
use rustc_session::Limit;
use rustc_span::def_id::LOCAL_CRATE;
use thin_vec::ThinVec;
use crate::QueryConfigRestored;
@ -93,43 +90,31 @@ impl QueryContext for QueryCtxt<'_> {
}
// Interactions with on_disk_cache
fn load_side_effects(self, prev_dep_node_index: SerializedDepNodeIndex) -> QuerySideEffects {
fn load_side_effect(
self,
prev_dep_node_index: SerializedDepNodeIndex,
) -> Option<QuerySideEffect> {
self.query_system
.on_disk_cache
.as_ref()
.map(|c| c.load_side_effects(self.tcx, prev_dep_node_index))
.unwrap_or_default()
.and_then(|c| c.load_side_effect(self.tcx, prev_dep_node_index))
}
#[inline(never)]
#[cold]
fn store_side_effects(self, dep_node_index: DepNodeIndex, side_effects: QuerySideEffects) {
fn store_side_effect(self, dep_node_index: DepNodeIndex, side_effect: QuerySideEffect) {
if let Some(c) = self.query_system.on_disk_cache.as_ref() {
c.store_side_effects(dep_node_index, side_effects)
}
}
#[inline(never)]
#[cold]
fn store_side_effects_for_anon_node(
self,
dep_node_index: DepNodeIndex,
side_effects: QuerySideEffects,
) {
if let Some(c) = self.query_system.on_disk_cache.as_ref() {
c.store_side_effects_for_anon_node(dep_node_index, side_effects)
c.store_side_effect(dep_node_index, side_effect)
}
}
/// Executes a job by changing the `ImplicitCtxt` to point to the
/// new query job while it executes. It returns the diagnostics
/// captured during execution and the actual result.
/// new query job while it executes.
#[inline(always)]
fn start_query<R>(
self,
token: QueryJobId,
depth_limit: bool,
diagnostics: Option<&Lock<ThinVec<DiagInner>>>,
compute: impl FnOnce() -> R,
) -> R {
// The `TyCtxt` stored in TLS has the same global interner lifetime
@ -144,7 +129,6 @@ impl QueryContext for QueryCtxt<'_> {
let new_icx = ImplicitCtxt {
tcx: self.tcx,
query: Some(token),
diagnostics,
query_depth: current_icx.query_depth + depth_limit as usize,
task_deps: current_icx.task_deps,
};
@ -501,7 +485,7 @@ where
is_anon,
is_eval_always,
fingerprint_style,
force_from_dep_node: Some(|tcx, dep_node| {
force_from_dep_node: Some(|tcx, dep_node, _| {
force_from_dep_node(Q::config(tcx), tcx, dep_node)
}),
try_load_from_on_disk_cache: Some(|tcx, dep_node| {
@ -803,7 +787,7 @@ macro_rules! define_queries {
is_anon: false,
is_eval_always: false,
fingerprint_style: FingerprintStyle::Unit,
force_from_dep_node: Some(|_, dep_node| bug!("force_from_dep_node: encountered {:?}", dep_node)),
force_from_dep_node: Some(|_, dep_node, _| bug!("force_from_dep_node: encountered {:?}", dep_node)),
try_load_from_on_disk_cache: None,
name: &"Null",
}
@ -815,12 +799,26 @@ macro_rules! define_queries {
is_anon: false,
is_eval_always: false,
fingerprint_style: FingerprintStyle::Unit,
force_from_dep_node: Some(|_, dep_node| bug!("force_from_dep_node: encountered {:?}", dep_node)),
force_from_dep_node: Some(|_, dep_node, _| bug!("force_from_dep_node: encountered {:?}", dep_node)),
try_load_from_on_disk_cache: None,
name: &"Red",
}
}
pub(crate) fn SideEffect<'tcx>() -> DepKindStruct<'tcx> {
DepKindStruct {
is_anon: false,
is_eval_always: false,
fingerprint_style: FingerprintStyle::Unit,
force_from_dep_node: Some(|tcx, _, prev_index| {
tcx.dep_graph.force_diagnostic_node(QueryCtxt::new(tcx), prev_index);
true
}),
try_load_from_on_disk_cache: None,
name: &"SideEffect",
}
}
pub(crate) fn TraitSelect<'tcx>() -> DepKindStruct<'tcx> {
DepKindStruct {
is_anon: true,

5
compiler/rustc_query_system/src/dep_graph/dep_node.rs
View file

@ -64,7 +64,7 @@ use rustc_data_structures::stable_hasher::{HashStable, StableHasher, StableOrd,
use rustc_hir::definitions::DefPathHash;
use rustc_macros::{Decodable, Encodable};
use super::{DepContext, FingerprintStyle};
use super::{DepContext, FingerprintStyle, SerializedDepNodeIndex};
use crate::ich::StableHashingContext;
/// This serves as an index into arrays built by `make_dep_kind_array`.
@ -275,7 +275,8 @@ pub struct DepKindStruct<Tcx: DepContext> {
/// with kind `MirValidated`, we know that the GUID/fingerprint of the `DepNode`
/// is actually a `DefPathHash`, and can therefore just look up the corresponding
/// `DefId` in `tcx.def_path_hash_to_def_id`.
pub force_from_dep_node: Option<fn(tcx: Tcx, dep_node: DepNode) -> bool>,
pub force_from_dep_node:
Option<fn(tcx: Tcx, dep_node: DepNode, prev_index: SerializedDepNodeIndex) -> bool>,
/// Invoke a query to put the on-disk cached value in memory.
pub try_load_from_on_disk_cache: Option<fn(Tcx, DepNode)>,

124
compiler/rustc_query_system/src/dep_graph/graph.rs
View file

@ -5,13 +5,14 @@ use std::marker::PhantomData;
use std::sync::Arc;
use std::sync::atomic::{AtomicU32, Ordering};
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fingerprint::{Fingerprint, PackedFingerprint};
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::profiling::{QueryInvocationId, SelfProfilerRef};
use rustc_data_structures::sharded::{self, ShardedHashMap};
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::sync::{AtomicU64, Lock};
use rustc_data_structures::unord::UnordMap;
use rustc_errors::DiagInner;
use rustc_index::IndexVec;
use rustc_macros::{Decodable, Encodable};
use rustc_serialize::opaque::{FileEncodeResult, FileEncoder};
@ -24,7 +25,7 @@ use super::serialized::{GraphEncoder, SerializedDepGraph, SerializedDepNodeIndex
use super::{DepContext, DepKind, DepNode, Deps, HasDepContext, WorkProductId};
use crate::dep_graph::edges::EdgesVec;
use crate::ich::StableHashingContext;
use crate::query::{QueryContext, QuerySideEffects};
use crate::query::{QueryContext, QuerySideEffect};
#[derive(Clone)]
pub struct DepGraph<D: Deps> {
@ -91,8 +92,6 @@ pub(crate) struct DepGraphData<D: Deps> {
colors: DepNodeColorMap,
processed_side_effects: Lock<FxHashSet<DepNodeIndex>>,
/// When we load, there may be `.o` files, cached MIR, or other such
/// things available to us. If we find that they are not dirty, we
/// load the path to the file storing those work-products here into
@ -174,7 +173,6 @@ impl<D: Deps> DepGraph<D> {
previous_work_products: prev_work_products,
dep_node_debug: Default::default(),
current,
processed_side_effects: Default::default(),
previous: prev_graph,
colors,
debug_loaded_from_disk: Default::default(),
@ -535,6 +533,32 @@ impl<D: Deps> DepGraph<D> {
}
}
/// This encodes a diagnostic by creating a node with an unique index and assoicating
/// `diagnostic` with it, for use in the next session.
#[inline]
pub fn record_diagnostic<Qcx: QueryContext>(&self, qcx: Qcx, diagnostic: &DiagInner) {
if let Some(ref data) = self.data {
D::read_deps(|task_deps| match task_deps {
TaskDepsRef::EvalAlways | TaskDepsRef::Ignore => return,
TaskDepsRef::Forbid | TaskDepsRef::Allow(..) => {
self.read_index(data.encode_diagnostic(qcx, diagnostic));
}
})
}
}
/// This forces a diagnostic node green by running its side effect. `prev_index` would
/// refer to a node created used `encode_diagnostic` in the previous session.
#[inline]
pub fn force_diagnostic_node<Qcx: QueryContext>(
&self,
qcx: Qcx,
prev_index: SerializedDepNodeIndex,
) {
if let Some(ref data) = self.data {
data.force_diagnostic_node(qcx, prev_index);
}
}
/// Create a node when we force-feed a value into the query cache.
/// This is used to remove cycles during type-checking const generic parameters.
///
@ -656,6 +680,57 @@ impl<D: Deps> DepGraphData<D> {
pub(crate) fn mark_debug_loaded_from_disk(&self, dep_node: DepNode) {
self.debug_loaded_from_disk.lock().insert(dep_node);
}
/// This encodes a diagnostic by creating a node with an unique index and assoicating
/// `diagnostic` with it, for use in the next session.
#[inline]
fn encode_diagnostic<Qcx: QueryContext>(
&self,
qcx: Qcx,
diagnostic: &DiagInner,
) -> DepNodeIndex {
// Use `send` so we get an unique index, even though the dep node is not.
let dep_node_index = self.current.encoder.send(
DepNode {
kind: D::DEP_KIND_SIDE_EFFECT,
hash: PackedFingerprint::from(Fingerprint::ZERO),
},
Fingerprint::ZERO,
// We want the side effect node to always be red so it will be forced and emit the
// diagnostic.
std::iter::once(DepNodeIndex::FOREVER_RED_NODE).collect(),
);
let side_effect = QuerySideEffect::Diagnostic(diagnostic.clone());
qcx.store_side_effect(dep_node_index, side_effect);
dep_node_index
}
/// This forces a diagnostic node green by running its side effect. `prev_index` would
/// refer to a node created used `encode_diagnostic` in the previous session.
#[inline]
fn force_diagnostic_node<Qcx: QueryContext>(
&self,
qcx: Qcx,
prev_index: SerializedDepNodeIndex,
) {
D::with_deps(TaskDepsRef::Ignore, || {
let side_effect = qcx.load_side_effect(prev_index).unwrap();
match &side_effect {
QuerySideEffect::Diagnostic(diagnostic) => {
qcx.dep_context().sess().dcx().emit_diagnostic(diagnostic.clone());
}
}
// Promote the previous diagnostics to the current session.
let index = self.current.promote_node_and_deps_to_current(&self.previous, prev_index);
// FIXME: Can this race with a parallel compiler?
qcx.store_side_effect(index, side_effect);
// Mark the node as green.
self.colors.insert(prev_index, DepNodeColor::Green(index));
})
}
}
impl<D: Deps> DepGraph<D> {
@ -794,7 +869,7 @@ impl<D: Deps> DepGraphData<D> {
// We failed to mark it green, so we try to force the query.
debug!("trying to force dependency {dep_dep_node:?}");
if !qcx.dep_context().try_force_from_dep_node(*dep_dep_node, frame) {
if !qcx.dep_context().try_force_from_dep_node(*dep_dep_node, parent_dep_node_index, frame) {
// The DepNode could not be forced.
debug!("dependency {dep_dep_node:?} could not be forced");
return None;
@ -867,16 +942,6 @@ impl<D: Deps> DepGraphData<D> {
// ... emitting any stored diagnostic ...
// FIXME: Store the fact that a node has diagnostics in a bit in the dep graph somewhere
// Maybe store a list on disk and encode this fact in the DepNodeState
let side_effects = qcx.load_side_effects(prev_dep_node_index);
if side_effects.maybe_any() {
qcx.dep_context().dep_graph().with_query_deserialization(|| {
self.emit_side_effects(qcx, dep_node_index, side_effects)
});
}
// ... and finally storing a "Green" entry in the color map.
// Multiple threads can all write the same color here
self.colors.insert(prev_dep_node_index, DepNodeColor::Green(dep_node_index));
@ -884,33 +949,6 @@ impl<D: Deps> DepGraphData<D> {
debug!("successfully marked {dep_node:?} as green");
Some(dep_node_index)
}
/// Atomically emits some loaded diagnostics.
/// This may be called concurrently on multiple threads for the same dep node.
#[cold]
#[inline(never)]
fn emit_side_effects<Qcx: QueryContext<Deps = D>>(
&self,
qcx: Qcx,
dep_node_index: DepNodeIndex,
side_effects: QuerySideEffects,
) {
let mut processed = self.processed_side_effects.lock();
if processed.insert(dep_node_index) {
// We were the first to insert the node in the set so this thread
// must process side effects
// Promote the previous diagnostics to the current session.
qcx.store_side_effects(dep_node_index, side_effects.clone());
let dcx = qcx.dep_context().sess().dcx();
for diagnostic in side_effects.diagnostics {
dcx.emit_diagnostic(diagnostic);
}
}
}
}
impl<D: Deps> DepGraph<D> {

12
compiler/rustc_query_system/src/dep_graph/mod.rs
View file

@ -58,10 +58,15 @@ pub trait DepContext: Copy {
/// dep-node or when the query kind outright does not support it.
#[inline]
#[instrument(skip(self, frame), level = "debug")]
fn try_force_from_dep_node(self, dep_node: DepNode, frame: Option<&MarkFrame<'_>>) -> bool {
fn try_force_from_dep_node(
self,
dep_node: DepNode,
prev_index: SerializedDepNodeIndex,
frame: Option<&MarkFrame<'_>>,
) -> bool {
let cb = self.dep_kind_info(dep_node.kind);
if let Some(f) = cb.force_from_dep_node {
match panic::catch_unwind(panic::AssertUnwindSafe(|| f(self, dep_node))) {
match panic::catch_unwind(panic::AssertUnwindSafe(|| f(self, dep_node, prev_index))) {
Err(value) => {
if !value.is::<rustc_errors::FatalErrorMarker>() {
print_markframe_trace(self.dep_graph(), frame);
@ -101,6 +106,9 @@ pub trait Deps {
/// We use this to create a forever-red node.
const DEP_KIND_RED: DepKind;
/// We use this to create a side effect node.
const DEP_KIND_SIDE_EFFECT: DepKind;
/// This is the highest value a `DepKind` can have. It's used during encoding to
/// pack information into the unused bits.
const DEP_KIND_MAX: u16;

65
compiler/rustc_query_system/src/query/mod.rs
View file

@ -11,14 +11,12 @@ mod caches;
pub use self::caches::{DefIdCache, DefaultCache, QueryCache, SingleCache, VecCache};
mod config;
use rustc_data_structures::sync::Lock;
use rustc_errors::DiagInner;
use rustc_hashes::Hash64;
use rustc_hir::def::DefKind;
use rustc_macros::{Decodable, Encodable};
use rustc_span::Span;
use rustc_span::def_id::DefId;
use thin_vec::ThinVec;
pub use self::config::{HashResult, QueryConfig};
use crate::dep_graph::{DepKind, DepNodeIndex, HasDepContext, SerializedDepNodeIndex};
@ -64,33 +62,22 @@ impl QueryStackFrame {
}
}
/// Tracks 'side effects' for a particular query.
/// Track a 'side effects' for a particular query.
/// This struct is saved to disk along with the query result,
/// and loaded from disk if we mark the query as green.
/// This allows us to 'replay' changes to global state
/// that would otherwise only occur if we actually
/// executed the query method.
#[derive(Debug, Clone, Default, Encodable, Decodable)]
pub struct QuerySideEffects {
/// Stores any diagnostics emitted during query execution.
/// These diagnostics will be re-emitted if we mark
/// the query as green.
pub(super) diagnostics: ThinVec<DiagInner>,
}
impl QuerySideEffects {
/// Returns true if there might be side effects.
#[inline]
pub fn maybe_any(&self) -> bool {
let QuerySideEffects { diagnostics } = self;
// Use `has_capacity` so that the destructor for `self.diagnostics` can be skipped
// if `maybe_any` is known to be false.
diagnostics.has_capacity()
}
pub fn append(&mut self, other: QuerySideEffects) {
let QuerySideEffects { diagnostics } = self;
diagnostics.extend(other.diagnostics);
}
///
/// Each side effect gets an unique dep node index which is added
/// as a dependency of the query which had the effect.
#[derive(Debug, Encodable, Decodable)]
pub enum QuerySideEffect {
/// Stores a diagnostic emitted during query execution.
/// This diagnostic will be re-emitted if we mark
/// the query as green, as that query will have the side
/// effect dep node as a dependency.
Diagnostic(DiagInner),
}
pub trait QueryContext: HasDepContext {
@ -101,29 +88,19 @@ pub trait QueryContext: HasDepContext {
fn collect_active_jobs(self) -> QueryMap;
/// Load side effects associated to the node in the previous session.
fn load_side_effects(self, prev_dep_node_index: SerializedDepNodeIndex) -> QuerySideEffects;
/// Register diagnostics for the given node, for use in next session.
fn store_side_effects(self, dep_node_index: DepNodeIndex, side_effects: QuerySideEffects);
/// Register diagnostics for the given node, for use in next session.
fn store_side_effects_for_anon_node(
/// Load a side effect associated to the node in the previous session.
fn load_side_effect(
self,
dep_node_index: DepNodeIndex,
side_effects: QuerySideEffects,
);
prev_dep_node_index: SerializedDepNodeIndex,
) -> Option<QuerySideEffect>;
/// Register a side effect for the given node, for use in next session.
fn store_side_effect(self, dep_node_index: DepNodeIndex, side_effect: QuerySideEffect);
/// Executes a job by changing the `ImplicitCtxt` to point to the
/// new query job while it executes. It returns the diagnostics
/// captured during execution and the actual result.
fn start_query<R>(
self,
token: QueryJobId,
depth_limit: bool,
diagnostics: Option<&Lock<ThinVec<DiagInner>>>,
compute: impl FnOnce() -> R,
) -> R;
/// new query job while it executes.
fn start_query<R>(self, token: QueryJobId, depth_limit: bool, compute: impl FnOnce() -> R)
-> R;
fn depth_limit_error(self, job: QueryJobId);
}

24
compiler/rustc_query_system/src/query/plumbing.rs
View file

@ -12,11 +12,9 @@ use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fx::FxHashMap;
use rustc_data_structures::sharded::Sharded;
use rustc_data_structures::stack::ensure_sufficient_stack;
use rustc_data_structures::sync::Lock;
use rustc_data_structures::{outline, sync};
use rustc_errors::{Diag, FatalError, StashKey};
use rustc_span::{DUMMY_SP, Span};
use thin_vec::ThinVec;
use tracing::instrument;
use super::QueryConfig;
@ -25,9 +23,7 @@ use crate::dep_graph::{DepContext, DepGraphData, DepNode, DepNodeIndex, DepNodeP
use crate::ich::StableHashingContext;
use crate::query::caches::QueryCache;
use crate::query::job::{QueryInfo, QueryJob, QueryJobId, QueryJobInfo, QueryLatch, report_cycle};
use crate::query::{
QueryContext, QueryMap, QuerySideEffects, QueryStackFrame, SerializedDepNodeIndex,
};
use crate::query::{QueryContext, QueryMap, QueryStackFrame, SerializedDepNodeIndex};
pub struct QueryState<K> {
active: Sharded<FxHashMap<K, QueryResult>>,
@ -470,7 +466,7 @@ where
}
let prof_timer = qcx.dep_context().profiler().query_provider();
let result = qcx.start_query(job_id, query.depth_limit(), None, || query.compute(qcx, key));
let result = qcx.start_query(job_id, query.depth_limit(), || query.compute(qcx, key));
let dep_node_index = qcx.dep_context().dep_graph().next_virtual_depnode_index();
prof_timer.finish_with_query_invocation_id(dep_node_index.into());
@ -507,7 +503,7 @@ where
// The diagnostics for this query will be promoted to the current session during
// `try_mark_green()`, so we can ignore them here.
if let Some(ret) = qcx.start_query(job_id, false, None, || {
if let Some(ret) = qcx.start_query(job_id, false, || {
try_load_from_disk_and_cache_in_memory(query, dep_graph_data, qcx, &key, dep_node)
}) {
return ret;
@ -515,10 +511,8 @@ where
}
let prof_timer = qcx.dep_context().profiler().query_provider();
let diagnostics = Lock::new(ThinVec::new());
let (result, dep_node_index) =
qcx.start_query(job_id, query.depth_limit(), Some(&diagnostics), || {
let (result, dep_node_index) = qcx.start_query(job_id, query.depth_limit(), || {
if query.anon() {
return dep_graph_data.with_anon_task_inner(
*qcx.dep_context(),
@ -542,16 +536,6 @@ where
prof_timer.finish_with_query_invocation_id(dep_node_index.into());
let side_effects = QuerySideEffects { diagnostics: diagnostics.into_inner() };
if std::intrinsics::unlikely(side_effects.maybe_any()) {
if query.anon() {
qcx.store_side_effects_for_anon_node(dep_node_index, side_effects);
} else {
qcx.store_side_effects(dep_node_index, side_effects);
}
}
(result, dep_node_index)
}

2
compiler/rustc_session/src/options.rs
View file

@ -2525,7 +2525,7 @@ written to standard error output)"),
"for every macro invocation, print its name and arguments (default: no)"),
track_diagnostics: bool = (false, parse_bool, [UNTRACKED],
"tracks where in rustc a diagnostic was emitted"),
// Diagnostics are considered side-effects of a query (see `QuerySideEffects`) and are saved
// Diagnostics are considered side-effects of a query (see `QuerySideEffect`) and are saved
// alongside query results and changes to translation options can affect diagnostics - so
// translation options should be tracked.
translate_additional_ftl: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],