1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190

use crate::ich::StableHashingContext;
use crate::ty::query::try_load_from_on_disk_cache;
use crate::ty::{self, TyCtxt};
use rustc_data_structures::profiling::SelfProfilerRef;
use rustc_data_structures::sync::Lock;
use rustc_data_structures::thin_vec::ThinVec;
use rustc_errors::Diagnostic;
use rustc_hir::def_id::LocalDefId;

mod dep_node;

pub(crate) use rustc_query_system::dep_graph::DepNodeParams;
pub use rustc_query_system::dep_graph::{
    debug, hash_result, DepContext, DepNodeColor, DepNodeIndex, SerializedDepNodeIndex,
    WorkProduct, WorkProductId,
};

pub use dep_node::{label_strs, DepConstructor, DepKind, DepNode, DepNodeExt};

pub type DepGraph = rustc_query_system::dep_graph::DepGraph<DepKind>;
pub type TaskDeps = rustc_query_system::dep_graph::TaskDeps<DepKind>;
pub type DepGraphQuery = rustc_query_system::dep_graph::DepGraphQuery<DepKind>;
pub type PreviousDepGraph = rustc_query_system::dep_graph::PreviousDepGraph<DepKind>;
pub type SerializedDepGraph = rustc_query_system::dep_graph::SerializedDepGraph<DepKind>;

impl rustc_query_system::dep_graph::DepKind for DepKind {
    const NULL: Self = DepKind::Null;

    fn is_eval_always(&self) -> bool {
        DepKind::is_eval_always(self)
    }

    fn has_params(&self) -> bool {
        DepKind::has_params(self)
    }

    fn debug_node(node: &DepNode, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{:?}", node.kind)?;

        if !node.kind.has_params() && !node.kind.is_anon() {
            return Ok(());
        }

        write!(f, "(")?;

        ty::tls::with_opt(|opt_tcx| {
            if let Some(tcx) = opt_tcx {
                if let Some(def_id) = node.extract_def_id(tcx) {
                    write!(f, "{}", tcx.def_path_debug_str(def_id))?;
                } else if let Some(ref s) = tcx.dep_graph.dep_node_debug_str(*node) {
                    write!(f, "{}", s)?;
                } else {
                    write!(f, "{}", node.hash)?;
                }
            } else {
                write!(f, "{}", node.hash)?;
            }
            Ok(())
        })?;

        write!(f, ")")
    }

    fn with_deps<OP, R>(task_deps: Option<&Lock<TaskDeps>>, op: OP) -> R
    where
        OP: FnOnce() -> R,
    {
        ty::tls::with_context(|icx| {
            let icx = ty::tls::ImplicitCtxt { task_deps, ..icx.clone() };

            ty::tls::enter_context(&icx, |_| op())
        })
    }

    fn read_deps<OP>(op: OP)
    where
        OP: for<'a> FnOnce(Option<&'a Lock<TaskDeps>>),
    {
        ty::tls::with_context_opt(|icx| {
            let icx = if let Some(icx) = icx { icx } else { return };
            op(icx.task_deps)
        })
    }

    fn can_reconstruct_query_key(&self) -> bool {
        DepKind::can_reconstruct_query_key(self)
    }
}

impl<'tcx> DepContext for TyCtxt<'tcx> {
    type DepKind = DepKind;
    type StableHashingContext = StableHashingContext<'tcx>;

    fn create_stable_hashing_context(&self) -> Self::StableHashingContext {
        TyCtxt::create_stable_hashing_context(*self)
    }

    fn debug_dep_tasks(&self) -> bool {
        self.sess.opts.debugging_opts.dep_tasks
    }
    fn debug_dep_node(&self) -> bool {
        self.sess.opts.debugging_opts.incremental_info
            || self.sess.opts.debugging_opts.query_dep_graph
    }

    fn try_force_from_dep_node(&self, dep_node: &DepNode) -> bool {
        // FIXME: This match is just a workaround for incremental bugs and should
        // be removed. https://github.com/rust-lang/rust/issues/62649 is one such
        // bug that must be fixed before removing this.
        match dep_node.kind {
            DepKind::hir_owner | DepKind::hir_owner_nodes | DepKind::CrateMetadata => {
                if let Some(def_id) = dep_node.extract_def_id(*self) {
                    if def_id_corresponds_to_hir_dep_node(*self, def_id.expect_local()) {
                        if dep_node.kind == DepKind::CrateMetadata {
                            // The `DefPath` has corresponding node,
                            // and that node should have been marked
                            // either red or green in `data.colors`.
                            bug!(
                                "DepNode {:?} should have been \
                             pre-marked as red or green but wasn't.",
                                dep_node
                            );
                        }
                    } else {
                        // This `DefPath` does not have a
                        // corresponding `DepNode` (e.g. a
                        // struct field), and the ` DefPath`
                        // collided with the `DefPath` of a
                        // proper item that existed in the
                        // previous compilation session.
                        //
                        // Since the given `DefPath` does not
                        // denote the item that previously
                        // existed, we just fail to mark green.
                        return false;
                    }
                } else {
                    // If the node does not exist anymore, we
                    // just fail to mark green.
                    return false;
                }
            }
            _ => {
                // For other kinds of nodes it's OK to be
                // forced.
            }
        }

        debug!("try_force_from_dep_node({:?}) --- trying to force", dep_node);
        ty::query::force_from_dep_node(*self, dep_node)
    }

    fn has_errors_or_delayed_span_bugs(&self) -> bool {
        self.sess.has_errors_or_delayed_span_bugs()
    }

    fn diagnostic(&self) -> &rustc_errors::Handler {
        self.sess.diagnostic()
    }

    // Interactions with on_disk_cache
    fn try_load_from_on_disk_cache(&self, dep_node: &DepNode) {
        try_load_from_on_disk_cache(*self, dep_node)
    }

    fn load_diagnostics(&self, prev_dep_node_index: SerializedDepNodeIndex) -> Vec<Diagnostic> {
        self.queries.on_disk_cache.load_diagnostics(*self, prev_dep_node_index)
    }

    fn store_diagnostics(&self, dep_node_index: DepNodeIndex, diagnostics: ThinVec<Diagnostic>) {
        self.queries.on_disk_cache.store_diagnostics(dep_node_index, diagnostics)
    }

    fn store_diagnostics_for_anon_node(
        &self,
        dep_node_index: DepNodeIndex,
        diagnostics: ThinVec<Diagnostic>,
    ) {
        self.queries.on_disk_cache.store_diagnostics_for_anon_node(dep_node_index, diagnostics)
    }

    fn profiler(&self) -> &SelfProfilerRef {
        &self.prof
    }
}

fn def_id_corresponds_to_hir_dep_node(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
    let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
    def_id == hir_id.owner
}