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//===--- FileIndex.cpp - Indexes for files. ------------------------ C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "FileIndex.h"
#include "SymbolCollector.h"
#include "clang/Index/IndexingAction.h"
namespace clang {
namespace clangd {
namespace {
/// Retrieves namespace and class level symbols in \p Decls.
std::unique_ptr<SymbolSlab> indexAST(ASTContext &Ctx,
llvm::ArrayRef<const Decl *> Decls) {
auto Collector = std::make_shared<SymbolCollector>();
index::IndexingOptions IndexOpts;
IndexOpts.SystemSymbolFilter =
index::IndexingOptions::SystemSymbolFilterKind::All;
IndexOpts.IndexFunctionLocals = false;
index::indexTopLevelDecls(Ctx, Decls, Collector, IndexOpts);
auto Symbols = llvm::make_unique<SymbolSlab>();
*Symbols = Collector->takeSymbols();
return Symbols;
}
} // namespace
void FileSymbols::update(PathRef Path, std::unique_ptr<SymbolSlab> Slab) {
std::lock_guard<std::mutex> Lock(Mutex);
if (!Slab)
FileToSlabs.erase(Path);
else
FileToSlabs[Path] = std::shared_ptr<SymbolSlab>(Slab.release());
}
std::shared_ptr<std::vector<const Symbol *>> FileSymbols::allSymbols() {
// The snapshot manages life time of symbol slabs and provides pointers of all
// symbols in all slabs.
struct Snapshot {
std::vector<const Symbol *> Pointers;
std::vector<std::shared_ptr<SymbolSlab>> KeepAlive;
};
auto Snap = std::make_shared<Snapshot>();
{
std::lock_guard<std::mutex> Lock(Mutex);
for (const auto &FileAndSlab : FileToSlabs) {
Snap->KeepAlive.push_back(FileAndSlab.second);
for (const auto &Iter : *FileAndSlab.second)
Snap->Pointers.push_back(&Iter.second);
}
}
auto *Pointers = &Snap->Pointers;
// Use aliasing constructor to keep the snapshot alive along with the
// pointers.
return {std::move(Snap), Pointers};
}
void FileIndex::update(Context &Ctx, PathRef Path, ParsedAST *AST) {
if (!AST) {
FSymbols.update(Path, nullptr);
} else {
auto Slab = indexAST(AST->getASTContext(), AST->getTopLevelDecls());
FSymbols.update(Path, std::move(Slab));
}
auto Symbols = FSymbols.allSymbols();
Index.build(std::move(Symbols));
}
bool FileIndex::fuzzyFind(Context &Ctx, const FuzzyFindRequest &Req,
std::function<void(const Symbol &)> Callback) const {
return Index.fuzzyFind(Ctx, Req, std::move(Callback));
}
} // namespace clangd
} // namespace clang
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