crates/ra_ide/src/change.rs

   1 //! FIXME: write short doc here
   2
   3 use std::{fmt, sync::Arc, time};
   4
   5 use ra_db::{
   6     salsa::{Database, Durability, SweepStrategy},
   7     CrateGraph, CrateId, FileId, RelativePathBuf, SourceDatabase, SourceDatabaseExt, SourceRoot,
   8     SourceRootId,
   9 };
  10 use ra_prof::{memory_usage, profile, Bytes};
  11 use ra_syntax::SourceFile;
  12 #[cfg(not(feature = "wasm"))]
  13 use rayon::prelude::*;
  14 use rustc_hash::FxHashMap;
  15
  16 use crate::{
  17     db::{DebugData, RootDatabase},
  18     symbol_index::{SymbolIndex, SymbolsDatabase},
  19 };
  20
  21 #[derive(Default)]
  22 pub struct AnalysisChange {
  23     new_roots: Vec<(SourceRootId, bool)>,
  24     roots_changed: FxHashMap<SourceRootId, RootChange>,
  25     files_changed: Vec<(FileId, Arc<String>)>,
  26     libraries_added: Vec<LibraryData>,
  27     crate_graph: Option<CrateGraph>,
  28     debug_data: DebugData,
  29 }
  30
  31 impl fmt::Debug for AnalysisChange {
  32     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
  33         let mut d = fmt.debug_struct("AnalysisChange");
  34         if !self.new_roots.is_empty() {
  35             d.field("new_roots", &self.new_roots);
  36         }
  37         if !self.roots_changed.is_empty() {
  38             d.field("roots_changed", &self.roots_changed);
  39         }
  40         if !self.files_changed.is_empty() {
  41             d.field("files_changed", &self.files_changed.len());
  42         }
  43         if !self.libraries_added.is_empty() {
  44             d.field("libraries_added", &self.libraries_added.len());
  45         }
  46         if !self.crate_graph.is_none() {
  47             d.field("crate_graph", &self.crate_graph);
  48         }
  49         d.finish()
  50     }
  51 }
  52
  53 impl AnalysisChange {
  54     pub fn new() -> AnalysisChange {
  55         AnalysisChange::default()
  56     }
  57
  58     pub fn add_root(&mut self, root_id: SourceRootId, is_local: bool) {
  59         self.new_roots.push((root_id, is_local));
  60     }
  61
  62     pub fn add_file(
  63         &mut self,
  64         root_id: SourceRootId,
  65         file_id: FileId,
  66         path: RelativePathBuf,
  67         text: Arc<String>,
  68     ) {
  69         let file = AddFile { file_id, path, text };
  70         self.roots_changed.entry(root_id).or_default().added.push(file);
  71     }
  72
  73     pub fn change_file(&mut self, file_id: FileId, new_text: Arc<String>) {
  74         self.files_changed.push((file_id, new_text))
  75     }
  76
  77     pub fn remove_file(&mut self, root_id: SourceRootId, file_id: FileId, path: RelativePathBuf) {
  78         let file = RemoveFile { file_id, path };
  79         self.roots_changed.entry(root_id).or_default().removed.push(file);
  80     }
  81
  82     pub fn add_library(&mut self, data: LibraryData) {
  83         self.libraries_added.push(data)
  84     }
  85
  86     pub fn set_crate_graph(&mut self, graph: CrateGraph) {
  87         self.crate_graph = Some(graph);
  88     }
  89
  90     pub fn set_debug_crate_name(&mut self, crate_id: CrateId, name: String) {
  91         self.debug_data.crate_names.insert(crate_id, name);
  92     }
  93
  94     pub fn set_debug_root_path(&mut self, source_root_id: SourceRootId, path: String) {
  95         self.debug_data.root_paths.insert(source_root_id, path);
  96     }
  97 }
  98
  99 #[derive(Debug)]
 100 struct AddFile {
 101     file_id: FileId,
 102     path: RelativePathBuf,
 103     text: Arc<String>,
 104 }
 105
 106 #[derive(Debug)]
 107 struct RemoveFile {
 108     file_id: FileId,
 109     path: RelativePathBuf,
 110 }
 111
 112 #[derive(Default)]
 113 struct RootChange {
 114     added: Vec<AddFile>,
 115     removed: Vec<RemoveFile>,
 116 }
 117
 118 impl fmt::Debug for RootChange {
 119     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
 120         fmt.debug_struct("AnalysisChange")
 121             .field("added", &self.added.len())
 122             .field("removed", &self.removed.len())
 123             .finish()
 124     }
 125 }
 126
 127 pub struct LibraryData {
 128     root_id: SourceRootId,
 129     root_change: RootChange,
 130     symbol_index: SymbolIndex,
 131 }
 132
 133 impl fmt::Debug for LibraryData {
 134     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 135         f.debug_struct("LibraryData")
 136             .field("root_id", &self.root_id)
 137             .field("root_change", &self.root_change)
 138             .field("n_symbols", &self.symbol_index.len())
 139             .finish()
 140     }
 141 }
 142
 143 impl LibraryData {
 144     pub fn prepare(
 145         root_id: SourceRootId,
 146         files: Vec<(FileId, RelativePathBuf, Arc<String>)>,
 147     ) -> LibraryData {
 148         #[cfg(not(feature = "wasm"))]
 149         let iter = files.par_iter();
 150         #[cfg(feature = "wasm")]
 151         let iter = files.iter();
 152
 153         let symbol_index = SymbolIndex::for_files(iter.map(|(file_id, _, text)| {
 154             let parse = SourceFile::parse(text);
 155             (*file_id, parse)
 156         }));
 157         let mut root_change = RootChange::default();
 158         root_change.added = files
 159             .into_iter()
 160             .map(|(file_id, path, text)| AddFile { file_id, path, text })
 161             .collect();
 162         LibraryData { root_id, root_change, symbol_index }
 163     }
 164 }
 165
 166 const GC_COOLDOWN: time::Duration = time::Duration::from_millis(100);
 167
 168 impl RootDatabase {
 169     pub(crate) fn apply_change(&mut self, change: AnalysisChange) {
 170         let _p = profile("RootDatabase::apply_change");
 171         log::info!("apply_change {:?}", change);
 172         {
 173             let _p = profile("RootDatabase::apply_change/cancellation");
 174             self.salsa_runtime_mut().synthetic_write(Durability::LOW);
 175         }
 176         if !change.new_roots.is_empty() {
 177             let mut local_roots = Vec::clone(&self.local_roots());
 178             for (root_id, is_local) in change.new_roots {
 179                 let root = if is_local { SourceRoot::new() } else { SourceRoot::new_library() };
 180                 let durability = durability(&root);
 181                 self.set_source_root_with_durability(root_id, Arc::new(root), durability);
 182                 if is_local {
 183                     local_roots.push(root_id);
 184                 }
 185             }
 186             self.set_local_roots_with_durability(Arc::new(local_roots), Durability::HIGH);
 187         }
 188
 189         for (root_id, root_change) in change.roots_changed {
 190             self.apply_root_change(root_id, root_change);
 191         }
 192         for (file_id, text) in change.files_changed {
 193             let source_root_id = self.file_source_root(file_id);
 194             let source_root = self.source_root(source_root_id);
 195             let durability = durability(&source_root);
 196             self.set_file_text_with_durability(file_id, text, durability)
 197         }
 198         if !change.libraries_added.is_empty() {
 199             let mut libraries = Vec::clone(&self.library_roots());
 200             for library in change.libraries_added {
 201                 libraries.push(library.root_id);
 202                 self.set_source_root_with_durability(
 203                     library.root_id,
 204                     Default::default(),
 205                     Durability::HIGH,
 206                 );
 207                 self.set_library_symbols_with_durability(
 208                     library.root_id,
 209                     Arc::new(library.symbol_index),
 210                     Durability::HIGH,
 211                 );
 212                 self.apply_root_change(library.root_id, library.root_change);
 213             }
 214             self.set_library_roots_with_durability(Arc::new(libraries), Durability::HIGH);
 215         }
 216         if let Some(crate_graph) = change.crate_graph {
 217             self.set_crate_graph_with_durability(Arc::new(crate_graph), Durability::HIGH)
 218         }
 219
 220         Arc::make_mut(&mut self.debug_data).merge(change.debug_data)
 221     }
 222
 223     fn apply_root_change(&mut self, root_id: SourceRootId, root_change: RootChange) {
 224         let mut source_root = SourceRoot::clone(&self.source_root(root_id));
 225         let durability = durability(&source_root);
 226         for add_file in root_change.added {
 227             self.set_file_text_with_durability(add_file.file_id, add_file.text, durability);
 228             self.set_file_relative_path_with_durability(
 229                 add_file.file_id,
 230                 add_file.path.clone(),
 231                 durability,
 232             );
 233             self.set_file_source_root_with_durability(add_file.file_id, root_id, durability);
 234             source_root.insert_file(add_file.path, add_file.file_id);
 235         }
 236         for remove_file in root_change.removed {
 237             self.set_file_text_with_durability(remove_file.file_id, Default::default(), durability);
 238             source_root.remove_file(&remove_file.path);
 239         }
 240         self.set_source_root_with_durability(root_id, Arc::new(source_root), durability);
 241     }
 242
 243     pub(crate) fn maybe_collect_garbage(&mut self) {
 244         if cfg!(feature = "wasm") {
 245             return;
 246         }
 247
 248         if self.last_gc_check.elapsed() > GC_COOLDOWN {
 249             self.last_gc_check = crate::wasm_shims::Instant::now();
 250         }
 251     }
 252
 253     pub(crate) fn collect_garbage(&mut self) {
 254         if cfg!(feature = "wasm") {
 255             return;
 256         }
 257
 258         let _p = profile("RootDatabase::collect_garbage");
 259         self.last_gc = crate::wasm_shims::Instant::now();
 260
 261         let sweep = SweepStrategy::default().discard_values().sweep_all_revisions();
 262
 263         self.query(ra_db::ParseQuery).sweep(sweep);
 264         self.query(hir::db::ParseMacroQuery).sweep(sweep);
 265
 266         // Macros do take significant space, but less then the syntax trees
 267         // self.query(hir::db::MacroDefQuery).sweep(sweep);
 268         // self.query(hir::db::MacroArgQuery).sweep(sweep);
 269         // self.query(hir::db::MacroExpandQuery).sweep(sweep);
 270
 271         self.query(hir::db::AstIdMapQuery).sweep(sweep);
 272
 273         self.query(hir::db::BodyWithSourceMapQuery).sweep(sweep);
 274
 275         self.query(hir::db::ExprScopesQuery).sweep(sweep);
 276         self.query(hir::db::InferQuery).sweep(sweep);
 277         self.query(hir::db::BodyQuery).sweep(sweep);
 278     }
 279
 280     pub(crate) fn per_query_memory_usage(&mut self) -> Vec<(String, Bytes)> {
 281         let mut acc: Vec<(String, Bytes)> = vec![];
 282         let sweep = SweepStrategy::default().discard_values().sweep_all_revisions();
 283         macro_rules! sweep_each_query {
 284             ($($q:path)*) => {$(
 285                 let before = memory_usage().allocated;
 286                 self.query($q).sweep(sweep);
 287                 let after = memory_usage().allocated;
 288                 let q: $q = Default::default();
 289                 let name = format!("{:?}", q);
 290                 acc.push((name, before - after));
 291
 292                 let before = memory_usage().allocated;
 293                 self.query($q).sweep(sweep.discard_everything());
 294                 let after = memory_usage().allocated;
 295                 let q: $q = Default::default();
 296                 let name = format!("{:?} (deps)", q);
 297                 acc.push((name, before - after));
 298             )*}
 299         }
 300         sweep_each_query![
 301             ra_db::ParseQuery
 302             ra_db::SourceRootCratesQuery
 303             hir::db::AstIdMapQuery
 304             hir::db::ParseMacroQuery
 305             hir::db::MacroDefQuery
 306             hir::db::MacroArgQuery
 307             hir::db::MacroExpandQuery
 308             hir::db::StructDataQuery
 309             hir::db::EnumDataQuery
 310             hir::db::TraitDataQuery
 311             hir::db::RawItemsQuery
 312             hir::db::CrateDefMapQuery
 313             hir::db::GenericParamsQuery
 314             hir::db::FunctionDataQuery
 315             hir::db::TypeAliasDataQuery
 316             hir::db::ConstDataQuery
 317             hir::db::StaticDataQuery
 318             hir::db::ModuleLangItemsQuery
 319             hir::db::CrateLangItemsQuery
 320             hir::db::LangItemQuery
 321             hir::db::DocumentationQuery
 322             hir::db::ExprScopesQuery
 323             hir::db::InferQuery
 324             hir::db::TyQuery
 325             hir::db::ValueTyQuery
 326             hir::db::FieldTypesQuery
 327             hir::db::CallableItemSignatureQuery
 328             hir::db::GenericPredicatesQuery
 329             hir::db::GenericDefaultsQuery
 330             hir::db::BodyWithSourceMapQuery
 331             hir::db::BodyQuery
 332             hir::db::ImplsInCrateQuery
 333             hir::db::ImplsForTraitQuery
 334             hir::db::AssociatedTyDataQuery
 335             hir::db::TraitDatumQuery
 336             hir::db::StructDatumQuery
 337             hir::db::ImplDatumQuery
 338             hir::db::ImplDataQuery
 339             hir::db::TraitSolveQuery
 340         ];
 341         acc.sort_by_key(|it| std::cmp::Reverse(it.1));
 342         acc
 343     }
 344 }
 345
 346 fn durability(source_root: &SourceRoot) -> Durability {
 347     if source_root.is_library {
 348         Durability::HIGH
 349     } else {
 350         Durability::LOW
 351     }
 352 }