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| 1 | +mod out_of_band; |
| 2 | + |
| 3 | +use std::sync::Arc; |
| 4 | + |
| 5 | +use rustc_data_structures::fx::FxIndexMap; |
| 6 | +use rustc_hir::CRATE_OWNER_ID; |
| 7 | +use rustc_hir::def_id::{CrateNum, DefId, LOCAL_CRATE}; |
| 8 | +use rustc_hir::diagnostic_items::DiagnosticItems; |
| 9 | +use rustc_middle::ty::TyCtxt; |
| 10 | +use rustc_serialize::{Decodable, Encodable}; |
| 11 | +use rustc_span::{Span, Symbol}; |
| 12 | + |
| 13 | +use crate::ctxt::{AnalysisCtxt, QueryValueDecodable}; |
| 14 | +use crate::{attribute::KlintAttribute, ctxt::PersistentQuery}; |
| 15 | + |
| 16 | +#[derive(Diagnostic)] |
| 17 | +#[diag(klint_duplicate_diagnostic_item_in_crate)] |
| 18 | +struct DuplicateDiagnosticItemInCrate { |
| 19 | + #[primary_span] |
| 20 | + pub duplicate_span: Option<Span>, |
| 21 | + #[note(klint_diagnostic_item_first_defined)] |
| 22 | + pub orig_span: Option<Span>, |
| 23 | + #[note] |
| 24 | + pub different_crates: bool, |
| 25 | + pub crate_name: Symbol, |
| 26 | + pub orig_crate_name: Symbol, |
| 27 | + pub name: Symbol, |
| 28 | +} |
| 29 | + |
| 30 | +fn report_duplicate_item( |
| 31 | + tcx: TyCtxt<'_>, |
| 32 | + name: Symbol, |
| 33 | + original_def_id: DefId, |
| 34 | + item_def_id: DefId, |
| 35 | +) { |
| 36 | + let orig_span = tcx.hir_span_if_local(original_def_id); |
| 37 | + let duplicate_span = tcx.hir_span_if_local(item_def_id); |
| 38 | + tcx.dcx().emit_err(DuplicateDiagnosticItemInCrate { |
| 39 | + duplicate_span, |
| 40 | + orig_span, |
| 41 | + crate_name: tcx.crate_name(item_def_id.krate), |
| 42 | + orig_crate_name: tcx.crate_name(original_def_id.krate), |
| 43 | + different_crates: (item_def_id.krate != original_def_id.krate), |
| 44 | + name, |
| 45 | + }); |
| 46 | +} |
| 47 | + |
| 48 | +fn collect_item(tcx: TyCtxt<'_>, items: &mut DiagnosticItems, name: Symbol, item_def_id: DefId) { |
| 49 | + items.id_to_name.insert(item_def_id, name); |
| 50 | + if let Some(original_def_id) = items.name_to_id.insert(name, item_def_id) { |
| 51 | + if original_def_id != item_def_id { |
| 52 | + report_duplicate_item(tcx, name, original_def_id, item_def_id); |
| 53 | + } |
| 54 | + } |
| 55 | +} |
| 56 | + |
| 57 | +memoize!( |
| 58 | + pub fn klint_diagnostic_items<'tcx>( |
| 59 | + cx: &AnalysisCtxt<'tcx>, |
| 60 | + krate_num: CrateNum, |
| 61 | + ) -> Arc<DiagnosticItems> { |
| 62 | + if krate_num != LOCAL_CRATE { |
| 63 | + return cx |
| 64 | + .sql_load::<klint_diagnostic_items>(krate_num) |
| 65 | + .unwrap_or_default(); |
| 66 | + } |
| 67 | + |
| 68 | + let mut items = DiagnosticItems::default(); |
| 69 | + |
| 70 | + let crate_items = cx.hir_crate_items(()); |
| 71 | + for owner in crate_items.owners().chain(std::iter::once(CRATE_OWNER_ID)) { |
| 72 | + for attr in cx.klint_attributes(owner.into()).iter() { |
| 73 | + if let KlintAttribute::DiagnosticItem(name) = *attr { |
| 74 | + collect_item(cx.tcx, &mut items, name, owner.to_def_id()); |
| 75 | + } |
| 76 | + } |
| 77 | + } |
| 78 | + |
| 79 | + out_of_band::infer_missing_items(cx.tcx, &mut items); |
| 80 | + |
| 81 | + let ret = Arc::new(items); |
| 82 | + cx.sql_store::<klint_diagnostic_items>(krate_num, ret.clone()); |
| 83 | + ret |
| 84 | + } |
| 85 | +); |
| 86 | + |
| 87 | +impl QueryValueDecodable for klint_diagnostic_items { |
| 88 | + fn encode_value<'tcx>(value: &Self::Value<'tcx>, cx: &mut crate::serde::EncodeContext<'tcx>) { |
| 89 | + value.name_to_id.encode(cx); |
| 90 | + } |
| 91 | + |
| 92 | + fn decode_value<'a, 'tcx>(cx: &mut crate::serde::DecodeContext<'a, 'tcx>) -> Self::Value<'tcx> { |
| 93 | + let name_to_id = FxIndexMap::decode(cx); |
| 94 | + let id_to_name = name_to_id.iter().map(|(&name, &id)| (id, name)).collect(); |
| 95 | + Arc::new(DiagnosticItems { |
| 96 | + name_to_id, |
| 97 | + id_to_name, |
| 98 | + }) |
| 99 | + } |
| 100 | +} |
| 101 | + |
| 102 | +impl PersistentQuery for klint_diagnostic_items { |
| 103 | + type LocalKey<'tcx> = (); |
| 104 | + |
| 105 | + fn into_crate_and_local<'tcx>(key: CrateNum) -> (CrateNum, Self::LocalKey<'tcx>) { |
| 106 | + (key, ()) |
| 107 | + } |
| 108 | +} |
| 109 | + |
| 110 | +memoize!( |
| 111 | + pub fn klint_all_diagnostic_items<'tcx>(cx: &AnalysisCtxt<'tcx>) -> Arc<DiagnosticItems> { |
| 112 | + let mut items = DiagnosticItems::default(); |
| 113 | + |
| 114 | + for cnum in cx |
| 115 | + .crates(()) |
| 116 | + .iter() |
| 117 | + .copied() |
| 118 | + .filter(|cnum| cx.is_user_visible_dep(*cnum)) |
| 119 | + .chain(std::iter::once(LOCAL_CRATE)) |
| 120 | + { |
| 121 | + for (&name, &def_id) in &cx.klint_diagnostic_items(cnum).name_to_id { |
| 122 | + collect_item(cx.tcx, &mut items, name, def_id); |
| 123 | + } |
| 124 | + } |
| 125 | + |
| 126 | + Arc::new(items) |
| 127 | + } |
| 128 | +); |
| 129 | + |
| 130 | +impl<'tcx> AnalysisCtxt<'tcx> { |
| 131 | + pub fn get_klint_diagnostic_item(&self, name: Symbol) -> Option<DefId> { |
| 132 | + self.klint_all_diagnostic_items() |
| 133 | + .name_to_id |
| 134 | + .get(&name) |
| 135 | + .copied() |
| 136 | + } |
| 137 | +} |
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