forked from OSchip/llvm-project
Revert "Reland(2) "[clangd] Indexing of standard library""
This reverts commit ca875539f7
.
This commit is contained in:
parent
e44fe27251
commit
77533ea443
|
@ -119,7 +119,6 @@ add_clang_library(clangDaemon
|
|||
index/Ref.cpp
|
||||
index/Relation.cpp
|
||||
index/Serialization.cpp
|
||||
index/StdLib.cpp
|
||||
index/Symbol.cpp
|
||||
index/SymbolCollector.cpp
|
||||
index/SymbolID.cpp
|
||||
|
|
|
@ -26,7 +26,6 @@
|
|||
#include "index/CanonicalIncludes.h"
|
||||
#include "index/FileIndex.h"
|
||||
#include "index/Merge.h"
|
||||
#include "index/StdLib.h"
|
||||
#include "refactor/Rename.h"
|
||||
#include "refactor/Tweak.h"
|
||||
#include "support/Cancellation.h"
|
||||
|
@ -60,39 +59,16 @@ namespace {
|
|||
// Update the FileIndex with new ASTs and plumb the diagnostics responses.
|
||||
struct UpdateIndexCallbacks : public ParsingCallbacks {
|
||||
UpdateIndexCallbacks(FileIndex *FIndex,
|
||||
ClangdServer::Callbacks *ServerCallbacks,
|
||||
const ThreadsafeFS &TFS, AsyncTaskRunner *Tasks)
|
||||
: FIndex(FIndex), ServerCallbacks(ServerCallbacks), TFS(TFS),
|
||||
Tasks(Tasks) {}
|
||||
ClangdServer::Callbacks *ServerCallbacks)
|
||||
: FIndex(FIndex), ServerCallbacks(ServerCallbacks) {}
|
||||
|
||||
void onPreambleAST(PathRef Path, llvm::StringRef Version,
|
||||
const CompilerInvocation &CI, ASTContext &Ctx,
|
||||
void onPreambleAST(PathRef Path, llvm::StringRef Version, ASTContext &Ctx,
|
||||
Preprocessor &PP,
|
||||
const CanonicalIncludes &CanonIncludes) override {
|
||||
// If this preamble uses a standard library we haven't seen yet, index it.
|
||||
if (FIndex)
|
||||
if (auto Loc = Stdlib.add(*CI.getLangOpts(), PP.getHeaderSearchInfo()))
|
||||
indexStdlib(CI, std::move(*Loc));
|
||||
|
||||
if (FIndex)
|
||||
FIndex->updatePreamble(Path, Version, Ctx, PP, CanonIncludes);
|
||||
}
|
||||
|
||||
void indexStdlib(const CompilerInvocation &CI, StdLibLocation Loc) {
|
||||
auto Task = [this, LO(*CI.getLangOpts()), Loc(std::move(Loc)),
|
||||
CI(std::make_unique<CompilerInvocation>(CI))]() mutable {
|
||||
IndexFileIn IF;
|
||||
IF.Symbols = indexStandardLibrary(std::move(CI), Loc, TFS);
|
||||
if (Stdlib.isBest(LO))
|
||||
FIndex->updatePreamble(std::move(IF));
|
||||
};
|
||||
if (Tasks)
|
||||
// This doesn't have a semaphore to enforce -j, but it's rare.
|
||||
Tasks->runAsync("IndexStdlib", std::move(Task));
|
||||
else
|
||||
Task();
|
||||
}
|
||||
|
||||
void onMainAST(PathRef Path, ParsedAST &AST, PublishFn Publish) override {
|
||||
if (FIndex)
|
||||
FIndex->updateMain(Path, AST);
|
||||
|
@ -127,9 +103,6 @@ struct UpdateIndexCallbacks : public ParsingCallbacks {
|
|||
private:
|
||||
FileIndex *FIndex;
|
||||
ClangdServer::Callbacks *ServerCallbacks;
|
||||
const ThreadsafeFS &TFS;
|
||||
StdLibSet Stdlib;
|
||||
AsyncTaskRunner *Tasks;
|
||||
};
|
||||
|
||||
class DraftStoreFS : public ThreadsafeFS {
|
||||
|
@ -181,15 +154,12 @@ ClangdServer::ClangdServer(const GlobalCompilationDatabase &CDB,
|
|||
Transient(Opts.ImplicitCancellation ? TUScheduler::InvalidateOnUpdate
|
||||
: TUScheduler::NoInvalidation),
|
||||
DirtyFS(std::make_unique<DraftStoreFS>(TFS, DraftMgr)) {
|
||||
if (Opts.AsyncThreadsCount != 0)
|
||||
IndexTasks.emplace();
|
||||
// Pass a callback into `WorkScheduler` to extract symbols from a newly
|
||||
// parsed file and rebuild the file index synchronously each time an AST
|
||||
// is parsed.
|
||||
WorkScheduler.emplace(CDB, TUScheduler::Options(Opts),
|
||||
std::make_unique<UpdateIndexCallbacks>(
|
||||
DynamicIdx.get(), Callbacks, TFS,
|
||||
IndexTasks ? IndexTasks.getPointer() : nullptr));
|
||||
WorkScheduler.emplace(
|
||||
CDB, TUScheduler::Options(Opts),
|
||||
std::make_unique<UpdateIndexCallbacks>(DynamicIdx.get(), Callbacks));
|
||||
// Adds an index to the stack, at higher priority than existing indexes.
|
||||
auto AddIndex = [&](SymbolIndex *Idx) {
|
||||
if (this->Index != nullptr) {
|
||||
|
@ -1005,9 +975,6 @@ ClangdServer::blockUntilIdleForTest(llvm::Optional<double> TimeoutSeconds) {
|
|||
// and we're blocking the main thread.
|
||||
if (!WorkScheduler->blockUntilIdle(timeoutSeconds(TimeoutSeconds)))
|
||||
return false;
|
||||
// TUScheduler is the only thing that starts background indexing work.
|
||||
if (IndexTasks && !IndexTasks->wait(timeoutSeconds(TimeoutSeconds)))
|
||||
return false;
|
||||
|
||||
// Unfortunately we don't have strict topological order between the rest of
|
||||
// the components. E.g. CDB broadcast triggers backrgound indexing.
|
||||
|
|
|
@ -428,7 +428,6 @@ private:
|
|||
mutable std::mutex CachedCompletionFuzzyFindRequestMutex;
|
||||
|
||||
llvm::Optional<std::string> WorkspaceRoot;
|
||||
llvm::Optional<AsyncTaskRunner> IndexTasks; // for stdlib indexing.
|
||||
llvm::Optional<TUScheduler> WorkScheduler;
|
||||
// Invalidation policy used for actions that we assume are "transient".
|
||||
TUScheduler::ASTActionInvalidation Transient;
|
||||
|
|
|
@ -81,12 +81,11 @@ struct Config {
|
|||
/// forward-slashes.
|
||||
std::string MountPoint;
|
||||
};
|
||||
/// Controls index behavior.
|
||||
/// Controls background-index behavior.
|
||||
struct {
|
||||
/// Whether this TU should be background-indexed.
|
||||
/// Whether this TU should be indexed.
|
||||
BackgroundPolicy Background = BackgroundPolicy::Build;
|
||||
ExternalIndexSpec External;
|
||||
bool StandardLibrary = false;
|
||||
} Index;
|
||||
|
||||
enum UnusedIncludesPolicy { Strict, None };
|
||||
|
|
|
@ -332,11 +332,6 @@ struct FragmentCompiler {
|
|||
}
|
||||
if (F.External)
|
||||
compile(std::move(**F.External), F.External->Range);
|
||||
if (F.StandardLibrary)
|
||||
Out.Apply.push_back(
|
||||
[Val(**F.StandardLibrary)](const Params &, Config &C) {
|
||||
C.Index.StandardLibrary = Val;
|
||||
});
|
||||
}
|
||||
|
||||
void compile(Fragment::IndexBlock::ExternalBlock &&External,
|
||||
|
|
|
@ -199,9 +199,6 @@ struct Fragment {
|
|||
llvm::Optional<Located<std::string>> MountPoint;
|
||||
};
|
||||
llvm::Optional<Located<ExternalBlock>> External;
|
||||
// Whether the standard library visible from this file should be indexed.
|
||||
// This makes all standard library symbols available, included or not.
|
||||
llvm::Optional<Located<bool>> StandardLibrary;
|
||||
};
|
||||
IndexBlock Index;
|
||||
|
||||
|
|
|
@ -184,10 +184,6 @@ private:
|
|||
F.External.emplace(std::move(External));
|
||||
F.External->Range = N.getSourceRange();
|
||||
});
|
||||
Dict.handle("StandardLibrary", [&](Node &N) {
|
||||
if (auto StandardLibrary = boolValue(N, "StandardLibrary"))
|
||||
F.StandardLibrary = *StandardLibrary;
|
||||
});
|
||||
Dict.parse(N);
|
||||
}
|
||||
|
||||
|
|
|
@ -1013,10 +1013,9 @@ void PreambleThread::build(Request Req) {
|
|||
bool IsFirstPreamble = !LatestBuild;
|
||||
LatestBuild = clang::clangd::buildPreamble(
|
||||
FileName, *Req.CI, Inputs, StoreInMemory,
|
||||
[&](ASTContext &Ctx, Preprocessor &PP,
|
||||
const CanonicalIncludes &CanonIncludes) {
|
||||
Callbacks.onPreambleAST(FileName, Inputs.Version, *Req.CI, Ctx, PP,
|
||||
CanonIncludes);
|
||||
[this, Version(Inputs.Version)](ASTContext &Ctx, Preprocessor &PP,
|
||||
const CanonicalIncludes &CanonIncludes) {
|
||||
Callbacks.onPreambleAST(FileName, Version, Ctx, PP, CanonIncludes);
|
||||
},
|
||||
&Stats);
|
||||
if (!LatestBuild)
|
||||
|
|
|
@ -133,8 +133,8 @@ public:
|
|||
/// contains only AST nodes from the #include directives at the start of the
|
||||
/// file. AST node in the current file should be observed on onMainAST call.
|
||||
virtual void onPreambleAST(PathRef Path, llvm::StringRef Version,
|
||||
const CompilerInvocation &CI, ASTContext &Ctx,
|
||||
Preprocessor &PP, const CanonicalIncludes &) {}
|
||||
ASTContext &Ctx, Preprocessor &PP,
|
||||
const CanonicalIncludes &) {}
|
||||
|
||||
/// The argument function is run under the critical section guarding against
|
||||
/// races when closing the files.
|
||||
|
|
|
@ -425,7 +425,12 @@ FileIndex::FileIndex()
|
|||
MainFileSymbols(IndexContents::All),
|
||||
MainFileIndex(std::make_unique<MemIndex>()) {}
|
||||
|
||||
void FileIndex::updatePreamble(IndexFileIn IF) {
|
||||
void FileIndex::updatePreamble(PathRef Path, llvm::StringRef Version,
|
||||
ASTContext &AST, Preprocessor &PP,
|
||||
const CanonicalIncludes &Includes) {
|
||||
IndexFileIn IF;
|
||||
std::tie(IF.Symbols, std::ignore, IF.Relations) =
|
||||
indexHeaderSymbols(Version, AST, PP, Includes);
|
||||
FileShardedIndex ShardedIndex(std::move(IF));
|
||||
for (auto Uri : ShardedIndex.getAllSources()) {
|
||||
auto IF = ShardedIndex.getShard(Uri);
|
||||
|
@ -456,15 +461,6 @@ void FileIndex::updatePreamble(IndexFileIn IF) {
|
|||
}
|
||||
}
|
||||
|
||||
void FileIndex::updatePreamble(PathRef Path, llvm::StringRef Version,
|
||||
ASTContext &AST, Preprocessor &PP,
|
||||
const CanonicalIncludes &Includes) {
|
||||
IndexFileIn IF;
|
||||
std::tie(IF.Symbols, std::ignore, IF.Relations) =
|
||||
indexHeaderSymbols(Version, AST, PP, Includes);
|
||||
updatePreamble(std::move(IF));
|
||||
}
|
||||
|
||||
void FileIndex::updateMain(PathRef Path, ParsedAST &AST) {
|
||||
auto Contents = indexMainDecls(AST);
|
||||
MainFileSymbols.update(
|
||||
|
|
|
@ -114,7 +114,6 @@ public:
|
|||
/// and macros in \p PP.
|
||||
void updatePreamble(PathRef Path, llvm::StringRef Version, ASTContext &AST,
|
||||
Preprocessor &PP, const CanonicalIncludes &Includes);
|
||||
void updatePreamble(IndexFileIn);
|
||||
|
||||
/// Update symbols and references from main file \p Path with
|
||||
/// `indexMainDecls`.
|
||||
|
|
|
@ -1,363 +0,0 @@
|
|||
//===-- StdLib.cpp ----------------------------------------------*- C++ -*-===//
|
||||
//
|
||||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||||
// See https://llvm.org/LICENSE.txt for license information.
|
||||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
#include "StdLib.h"
|
||||
#include <fstream>
|
||||
#include <memory>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
#include "Compiler.h"
|
||||
#include "Config.h"
|
||||
#include "SymbolCollector.h"
|
||||
#include "index/IndexAction.h"
|
||||
#include "support/Logger.h"
|
||||
#include "support/ThreadsafeFS.h"
|
||||
#include "support/Trace.h"
|
||||
#include "clang/Basic/LangOptions.h"
|
||||
#include "clang/Frontend/CompilerInvocation.h"
|
||||
#include "clang/Lex/PreprocessorOptions.h"
|
||||
#include "llvm/ADT/IntrusiveRefCntPtr.h"
|
||||
#include "llvm/ADT/None.h"
|
||||
#include "llvm/ADT/StringRef.h"
|
||||
#include "llvm/Support/MemoryBuffer.h"
|
||||
#include "llvm/Support/Path.h"
|
||||
|
||||
namespace clang {
|
||||
namespace clangd {
|
||||
namespace {
|
||||
|
||||
enum Lang { C, CXX };
|
||||
|
||||
Lang langFromOpts(const LangOptions &LO) { return LO.CPlusPlus ? CXX : C; }
|
||||
llvm::StringLiteral mandatoryHeader(Lang L) {
|
||||
switch (L) {
|
||||
case C:
|
||||
return "stdio.h";
|
||||
case CXX:
|
||||
return "vector";
|
||||
}
|
||||
llvm_unreachable("unhandled Lang");
|
||||
}
|
||||
|
||||
LangStandard::Kind standardFromOpts(const LangOptions &LO) {
|
||||
if (LO.CPlusPlus) {
|
||||
if (LO.CPlusPlus2b)
|
||||
return LangStandard::lang_cxx2b;
|
||||
if (LO.CPlusPlus20)
|
||||
return LangStandard::lang_cxx20;
|
||||
if (LO.CPlusPlus17)
|
||||
return LangStandard::lang_cxx17;
|
||||
if (LO.CPlusPlus14)
|
||||
return LangStandard::lang_cxx14;
|
||||
if (LO.CPlusPlus11)
|
||||
return LangStandard::lang_cxx11;
|
||||
return LangStandard::lang_cxx98;
|
||||
}
|
||||
if (LO.C2x)
|
||||
return LangStandard::lang_c2x;
|
||||
// C17 has no new features, so treat {C11,C17} as C17.
|
||||
if (LO.C11)
|
||||
return LangStandard::lang_c17;
|
||||
return LangStandard::lang_c99;
|
||||
}
|
||||
|
||||
std::string buildUmbrella(llvm::StringLiteral Mandatory,
|
||||
std::vector<llvm::StringLiteral> Headers) {
|
||||
std::string Result;
|
||||
llvm::raw_string_ostream OS(Result);
|
||||
|
||||
// We __has_include guard all our #includes to avoid errors when using older
|
||||
// stdlib version that don't have headers for the newest language standards.
|
||||
// But make sure we get *some* error if things are totally broken.
|
||||
OS << llvm::formatv(
|
||||
"#if !__has_include(<{0}>)\n"
|
||||
"#error Mandatory header <{0}> not found in standard library!\n"
|
||||
"#endif\n",
|
||||
Mandatory);
|
||||
|
||||
llvm::sort(Headers.begin(), Headers.end());
|
||||
auto Last = std::unique(Headers.begin(), Headers.end());
|
||||
for (auto Header = Headers.begin(); Header != Last; ++Header) {
|
||||
OS << llvm::formatv("#if __has_include({0})\n"
|
||||
"#include {0}\n"
|
||||
"#endif\n",
|
||||
*Header);
|
||||
}
|
||||
OS.flush();
|
||||
return Result;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
llvm::StringRef getStdlibUmbrellaHeader(const LangOptions &LO) {
|
||||
// The umbrella header is the same for all versions of each language.
|
||||
// Headers that are unsupported in old lang versions are usually guarded by
|
||||
// #if. Some headers may be not present in old stdlib versions, the umbrella
|
||||
// header guards with __has_include for this purpose.
|
||||
Lang L = langFromOpts(LO);
|
||||
switch (L) {
|
||||
case CXX:
|
||||
static std::string *UmbrellaCXX =
|
||||
new std::string(buildUmbrella(mandatoryHeader(L), {
|
||||
#define SYMBOL(Name, NameSpace, Header) #Header,
|
||||
#include "clang/Tooling/Inclusions/StdSymbolMap.inc"
|
||||
#undef SYMBOL
|
||||
}));
|
||||
return *UmbrellaCXX;
|
||||
case C:
|
||||
static std::string *UmbrellaC =
|
||||
new std::string(buildUmbrella(mandatoryHeader(L), {
|
||||
#define SYMBOL(Name, NameSpace, Header) #Header,
|
||||
#include "clang/Tooling/Inclusions/CSymbolMap.inc"
|
||||
#undef SYMBOL
|
||||
}));
|
||||
return *UmbrellaC;
|
||||
}
|
||||
}
|
||||
|
||||
namespace {
|
||||
|
||||
// Including the standard library leaks unwanted transitively included symbols.
|
||||
//
|
||||
// We want to drop these, they're a bit tricky to identify:
|
||||
// - we don't want to limit to symbols on our list, as our list has only
|
||||
// top-level symbols (and there may be legitimate stdlib extensions).
|
||||
// - we can't limit to only symbols defined in known stdlib headers, as stdlib
|
||||
// internal structure is murky
|
||||
// - we can't strictly require symbols to come from a particular path, e.g.
|
||||
// libstdc++ is mostly under /usr/include/c++/10/...
|
||||
// but std::ctype_base is under /usr/include/<platform>/c++/10/...
|
||||
// We require the symbol to come from a header that is *either* from
|
||||
// the standard library path (as identified by the location of <vector>), or
|
||||
// another header that defines a symbol from our stdlib list.
|
||||
SymbolSlab filter(SymbolSlab Slab, const StdLibLocation &Loc) {
|
||||
SymbolSlab::Builder Result;
|
||||
|
||||
static auto &StandardHeaders = *[] {
|
||||
auto *Set = new llvm::DenseSet<llvm::StringRef>();
|
||||
for (llvm::StringRef Header : {
|
||||
#define SYMBOL(Name, NameSpace, Header) #Header,
|
||||
#include "clang/Tooling/Inclusions/CSymbolMap.inc"
|
||||
#include "clang/Tooling/Inclusions/StdSymbolMap.inc"
|
||||
#undef SYMBOL
|
||||
})
|
||||
Set->insert(Header);
|
||||
return Set;
|
||||
}();
|
||||
|
||||
// Form prefixes like file:///usr/include/c++/10/
|
||||
// These can be trivially prefix-compared with URIs in the indexed symbols.
|
||||
llvm::SmallVector<std::string> StdLibURIPrefixes;
|
||||
for (const auto &Path : Loc.Paths) {
|
||||
StdLibURIPrefixes.push_back(URI::create(Path).toString());
|
||||
if (StdLibURIPrefixes.back().back() != '/')
|
||||
StdLibURIPrefixes.back().push_back('/');
|
||||
}
|
||||
// For each header URI, is it *either* prefixed by StdLibURIPrefixes *or*
|
||||
// owner of a symbol whose insertable header is in StandardHeaders?
|
||||
// Pointer key because strings in a SymbolSlab are interned.
|
||||
llvm::DenseMap<const char *, bool> GoodHeader;
|
||||
for (const Symbol &S : Slab) {
|
||||
if (!S.IncludeHeaders.empty() &&
|
||||
StandardHeaders.contains(S.IncludeHeaders.front().IncludeHeader)) {
|
||||
GoodHeader[S.CanonicalDeclaration.FileURI] = true;
|
||||
GoodHeader[S.Definition.FileURI] = true;
|
||||
continue;
|
||||
}
|
||||
for (const char *URI :
|
||||
{S.CanonicalDeclaration.FileURI, S.Definition.FileURI}) {
|
||||
auto R = GoodHeader.try_emplace(URI, false);
|
||||
if (R.second) {
|
||||
R.first->second = llvm::any_of(
|
||||
StdLibURIPrefixes,
|
||||
[&, URIStr(llvm::StringRef(URI))](const std::string &Prefix) {
|
||||
return URIStr.startswith(Prefix);
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
#ifndef NDEBUG
|
||||
for (const auto &Good : GoodHeader)
|
||||
if (Good.second && *Good.first)
|
||||
dlog("Stdlib header: {0}", Good.first);
|
||||
#endif
|
||||
// Empty URIs aren't considered good. (Definition can be blank).
|
||||
auto IsGoodHeader = [&](const char *C) { return *C && GoodHeader.lookup(C); };
|
||||
|
||||
for (const Symbol &S : Slab) {
|
||||
if (!(IsGoodHeader(S.CanonicalDeclaration.FileURI) ||
|
||||
IsGoodHeader(S.Definition.FileURI))) {
|
||||
dlog("Ignoring wrong-header symbol {0}{1} in {2}", S.Scope, S.Name,
|
||||
S.CanonicalDeclaration.FileURI);
|
||||
continue;
|
||||
}
|
||||
Result.insert(S);
|
||||
}
|
||||
|
||||
return std::move(Result).build();
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
SymbolSlab indexStandardLibrary(llvm::StringRef HeaderSources,
|
||||
std::unique_ptr<CompilerInvocation> CI,
|
||||
const StdLibLocation &Loc,
|
||||
const ThreadsafeFS &TFS) {
|
||||
if (CI->getFrontendOpts().Inputs.size() != 1 ||
|
||||
!CI->getPreprocessorOpts().ImplicitPCHInclude.empty()) {
|
||||
elog("Indexing standard library failed: bad CompilerInvocation");
|
||||
assert(false && "indexing stdlib with a dubious CompilerInvocation!");
|
||||
return SymbolSlab();
|
||||
}
|
||||
const FrontendInputFile &Input = CI->getFrontendOpts().Inputs.front();
|
||||
trace::Span Tracer("StandardLibraryIndex");
|
||||
LangStandard::Kind LangStd = standardFromOpts(*CI->getLangOpts());
|
||||
log("Indexing {0} standard library in the context of {1}",
|
||||
LangStandard::getLangStandardForKind(LangStd).getName(), Input.getFile());
|
||||
|
||||
SymbolSlab Symbols;
|
||||
IgnoreDiagnostics IgnoreDiags;
|
||||
// CompilerInvocation is taken from elsewhere, and may map a dirty buffer.
|
||||
CI->getPreprocessorOpts().clearRemappedFiles();
|
||||
auto Clang = prepareCompilerInstance(
|
||||
std::move(CI), /*Preamble=*/nullptr,
|
||||
llvm::MemoryBuffer::getMemBuffer(HeaderSources, Input.getFile()),
|
||||
TFS.view(/*CWD=*/llvm::None), IgnoreDiags);
|
||||
if (!Clang) {
|
||||
elog("Standard Library Index: Couldn't build compiler instance");
|
||||
return Symbols;
|
||||
}
|
||||
|
||||
SymbolCollector::Options IndexOpts;
|
||||
IndexOpts.Origin = SymbolOrigin::StdLib;
|
||||
IndexOpts.CollectMainFileSymbols = false;
|
||||
IndexOpts.CollectMainFileRefs = false;
|
||||
IndexOpts.CollectMacro = true;
|
||||
IndexOpts.StoreAllDocumentation = true;
|
||||
// Sadly we can't use IndexOpts.FileFilter to restrict indexing scope.
|
||||
// Files from outside the StdLibLocation may define true std symbols anyway.
|
||||
// We end up "blessing" such headers, and can only do that by indexing
|
||||
// everything first.
|
||||
|
||||
// Refs, relations, include graph in the stdlib mostly aren't useful.
|
||||
auto Action = createStaticIndexingAction(
|
||||
IndexOpts, [&](SymbolSlab S) { Symbols = std::move(S); }, nullptr,
|
||||
nullptr, nullptr);
|
||||
|
||||
if (!Action->BeginSourceFile(*Clang, Input)) {
|
||||
elog("Standard Library Index: BeginSourceFile() failed");
|
||||
return Symbols;
|
||||
}
|
||||
|
||||
if (llvm::Error Err = Action->Execute()) {
|
||||
elog("Standard Library Index: Execute failed: {0}", std::move(Err));
|
||||
return Symbols;
|
||||
}
|
||||
|
||||
Action->EndSourceFile();
|
||||
|
||||
unsigned SymbolsBeforeFilter = Symbols.size();
|
||||
Symbols = filter(std::move(Symbols), Loc);
|
||||
bool Errors = Clang->hasDiagnostics() &&
|
||||
Clang->getDiagnostics().hasUncompilableErrorOccurred();
|
||||
log("Indexed {0} standard library{3}: {1} symbols, {2} filtered",
|
||||
LangStandard::getLangStandardForKind(LangStd).getName(), Symbols.size(),
|
||||
SymbolsBeforeFilter - Symbols.size(),
|
||||
Errors ? " (incomplete due to errors)" : "");
|
||||
SPAN_ATTACH(Tracer, "symbols", int(Symbols.size()));
|
||||
return Symbols;
|
||||
}
|
||||
|
||||
SymbolSlab indexStandardLibrary(std::unique_ptr<CompilerInvocation> Invocation,
|
||||
const StdLibLocation &Loc,
|
||||
const ThreadsafeFS &TFS) {
|
||||
return indexStandardLibrary(
|
||||
getStdlibUmbrellaHeader(*Invocation->getLangOpts()),
|
||||
std::move(Invocation), Loc, TFS);
|
||||
}
|
||||
|
||||
bool StdLibSet::isBest(const LangOptions &LO) const {
|
||||
return standardFromOpts(LO) >=
|
||||
Best[langFromOpts(LO)].load(std::memory_order_acquire);
|
||||
}
|
||||
|
||||
llvm::Optional<StdLibLocation> StdLibSet::add(const LangOptions &LO,
|
||||
const HeaderSearch &HS) {
|
||||
Lang L = langFromOpts(LO);
|
||||
int OldVersion = Best[L].load(std::memory_order_acquire);
|
||||
int NewVersion = standardFromOpts(LO);
|
||||
dlog("Index stdlib? {0}",
|
||||
LangStandard::getLangStandardForKind(standardFromOpts(LO)).getName());
|
||||
|
||||
if (!Config::current().Index.StandardLibrary) {
|
||||
dlog("No: disabled in config");
|
||||
return llvm::None;
|
||||
}
|
||||
|
||||
if (NewVersion <= OldVersion) {
|
||||
dlog("No: have {0}, {1}>={2}",
|
||||
LangStandard::getLangStandardForKind(
|
||||
static_cast<LangStandard::Kind>(NewVersion))
|
||||
.getName(),
|
||||
OldVersion, NewVersion);
|
||||
return llvm::None;
|
||||
}
|
||||
|
||||
// We'd like to index a standard library here if there is one.
|
||||
// Check for the existence of <vector> on the search path.
|
||||
// We could cache this, but we only get here repeatedly when there's no
|
||||
// stdlib, and even then only once per preamble build.
|
||||
llvm::StringLiteral ProbeHeader = mandatoryHeader(L);
|
||||
llvm::SmallString<256> Path; // Scratch space.
|
||||
llvm::SmallVector<std::string> SearchPaths;
|
||||
auto RecordHeaderPath = [&](llvm::StringRef HeaderPath) {
|
||||
llvm::StringRef DirPath = llvm::sys::path::parent_path(HeaderPath);
|
||||
if (!HS.getFileMgr().getVirtualFileSystem().getRealPath(DirPath, Path))
|
||||
SearchPaths.emplace_back(Path);
|
||||
};
|
||||
for (const auto &DL :
|
||||
llvm::make_range(HS.search_dir_begin(), HS.search_dir_end())) {
|
||||
switch (DL.getLookupType()) {
|
||||
case DirectoryLookup::LT_NormalDir: {
|
||||
Path = DL.getDir()->getName();
|
||||
llvm::sys::path::append(Path, ProbeHeader);
|
||||
llvm::vfs::Status Stat;
|
||||
if (!HS.getFileMgr().getNoncachedStatValue(Path, Stat) &&
|
||||
Stat.isRegularFile())
|
||||
RecordHeaderPath(Path);
|
||||
break;
|
||||
}
|
||||
case DirectoryLookup::LT_Framework:
|
||||
// stdlib can't be a framework (framework includes must have a slash)
|
||||
continue;
|
||||
case DirectoryLookup::LT_HeaderMap:
|
||||
llvm::StringRef Target =
|
||||
DL.getHeaderMap()->lookupFilename(ProbeHeader, Path);
|
||||
if (!Target.empty())
|
||||
RecordHeaderPath(Target);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (SearchPaths.empty())
|
||||
return llvm::None;
|
||||
|
||||
dlog("Found standard library in {0}", llvm::join(SearchPaths, ", "));
|
||||
|
||||
while (!Best[L].compare_exchange_weak(OldVersion, NewVersion,
|
||||
std::memory_order_acq_rel))
|
||||
if (OldVersion >= NewVersion) {
|
||||
dlog("No: lost the race");
|
||||
return llvm::None; // Another thread won the race while we were checking.
|
||||
}
|
||||
|
||||
dlog("Yes, index stdlib!");
|
||||
return StdLibLocation{std::move(SearchPaths)};
|
||||
}
|
||||
|
||||
} // namespace clangd
|
||||
} // namespace clang
|
|
@ -1,110 +0,0 @@
|
|||
//===--- StdLib.h - Index the C and C++ standard library ---------*- C++-*-===//
|
||||
//
|
||||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||||
// See https://llvm.org/LICENSE.txt for license information.
|
||||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
// Eagerly indexing the standard library gives a much friendlier "warm start"
|
||||
// with working code completion in a standalone file or small project.
|
||||
//
|
||||
// We act as if we saw a file which included the whole standard library:
|
||||
// #include <array>
|
||||
// #include <bitset>
|
||||
// #include <chrono>
|
||||
// ...
|
||||
// We index this TU and feed the result into the dynamic index.
|
||||
//
|
||||
// This happens within the context of some particular open file, and we reuse
|
||||
// its CompilerInvocation. Matching its include path, LangOpts etc ensures that
|
||||
// we see the standard library and configuration that matches the project.
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_STDLIB_H
|
||||
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_STDLIB_H
|
||||
|
||||
#include "index/Symbol.h"
|
||||
#include "support/ThreadsafeFS.h"
|
||||
#include "llvm/ADT/StringRef.h"
|
||||
#include <string>
|
||||
|
||||
namespace clang {
|
||||
class CompilerInvocation;
|
||||
class LangOptions;
|
||||
class HeaderSearch;
|
||||
namespace clangd {
|
||||
|
||||
// The filesystem location where a standard library was found.
|
||||
//
|
||||
// This is the directory containing <vector> or <stdio.h>.
|
||||
// It's used to ensure we only index files that are in the standard library.
|
||||
//
|
||||
// The paths are canonicalized (FS "real path" with symlinks resolved).
|
||||
// This allows them to be easily compared against paths the indexer returns.
|
||||
struct StdLibLocation {
|
||||
llvm::SmallVector<std::string> Paths;
|
||||
};
|
||||
|
||||
// Tracks the state of standard library indexing within a particular index.
|
||||
//
|
||||
// In general, we don't want to index the standard library multiple times.
|
||||
// In most cases, this class just acts as a flag to ensure we only do it once.
|
||||
//
|
||||
// However, if we first open a C++11 file, and then a C++20 file, we *do*
|
||||
// want the index to be upgraded to include the extra symbols.
|
||||
// Similarly, the C and C++ standard library can coexist.
|
||||
class StdLibSet {
|
||||
std::atomic<int> Best[2] = {{-1}, {-1}};
|
||||
|
||||
public:
|
||||
// Determines if we should index the standard library in a configuration.
|
||||
//
|
||||
// This is true if:
|
||||
// - standard library indexing is enabled for the file
|
||||
// - the language version is higher than any previous add() for the language
|
||||
// - the standard library headers exist on the search path
|
||||
// Returns the location where the standard library was found.
|
||||
//
|
||||
// This function is threadsafe.
|
||||
llvm::Optional<StdLibLocation> add(const LangOptions &, const HeaderSearch &);
|
||||
|
||||
// Indicates whether a built index should be used.
|
||||
// It should not be used if a newer version has subsequently been added.
|
||||
//
|
||||
// Intended pattern is:
|
||||
// if (add()) {
|
||||
// symbols = indexStandardLibrary();
|
||||
// if (isBest())
|
||||
// index.update(symbols);
|
||||
// }
|
||||
//
|
||||
// This is still technically racy: we could return true here, then another
|
||||
// thread could add->index->update a better library before we can update.
|
||||
// We'd then overwrite it with the older version.
|
||||
// However, it's very unlikely: indexing takes a long time.
|
||||
bool isBest(const LangOptions &) const;
|
||||
};
|
||||
|
||||
// Index a standard library and return the discovered symbols.
|
||||
//
|
||||
// The compiler invocation should describe the file whose config we're reusing.
|
||||
// We overwrite its virtual buffer with a lot of #include statements.
|
||||
SymbolSlab indexStandardLibrary(std::unique_ptr<CompilerInvocation> Invocation,
|
||||
const StdLibLocation &Loc,
|
||||
const ThreadsafeFS &TFS);
|
||||
|
||||
// Variant that allows the umbrella header source to be specified.
|
||||
// Exposed for testing.
|
||||
SymbolSlab indexStandardLibrary(llvm::StringRef HeaderSources,
|
||||
std::unique_ptr<CompilerInvocation> CI,
|
||||
const StdLibLocation &Loc,
|
||||
const ThreadsafeFS &TFS);
|
||||
|
||||
// Generate header containing #includes for all standard library headers.
|
||||
// Exposed for testing.
|
||||
llvm::StringRef getStdlibUmbrellaHeader(const LangOptions &);
|
||||
|
||||
} // namespace clangd
|
||||
} // namespace clang
|
||||
|
||||
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_INDEX_STDLIB_H
|
|
@ -14,7 +14,7 @@ namespace clangd {
|
|||
llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, SymbolOrigin O) {
|
||||
if (O == SymbolOrigin::Unknown)
|
||||
return OS << "unknown";
|
||||
constexpr static char Sigils[] = "AOSMIRP7BL012345";
|
||||
constexpr static char Sigils[] = "AOSMIRP7B9012345";
|
||||
for (unsigned I = 0; I < sizeof(Sigils); ++I)
|
||||
if (static_cast<uint16_t>(O) & 1u << I)
|
||||
OS << Sigils[I];
|
||||
|
|
|
@ -29,7 +29,6 @@ enum class SymbolOrigin : uint16_t {
|
|||
Preamble = 1 << 6, // From the dynamic index of preambles.
|
||||
// 7 reserved
|
||||
Background = 1 << 8, // From the automatic project index.
|
||||
StdLib = 1 << 9, // Standard library index.
|
||||
};
|
||||
|
||||
inline SymbolOrigin operator|(SymbolOrigin A, SymbolOrigin B) {
|
||||
|
|
|
@ -81,7 +81,6 @@ add_unittest(ClangdUnitTests ClangdTests
|
|||
SemanticSelectionTests.cpp
|
||||
SerializationTests.cpp
|
||||
SourceCodeTests.cpp
|
||||
StdLibTests.cpp
|
||||
SymbolCollectorTests.cpp
|
||||
SymbolInfoTests.cpp
|
||||
SyncAPI.cpp
|
||||
|
|
|
@ -1,162 +0,0 @@
|
|||
//===-- StdLibTests.cpp -----------------------------------------*- C++ -*-===//
|
||||
//
|
||||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||||
// See https://llvm.org/LICENSE.txt for license information.
|
||||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "Annotations.h"
|
||||
#include "ClangdServer.h"
|
||||
#include "CodeComplete.h"
|
||||
#include "Compiler.h"
|
||||
#include "Config.h"
|
||||
#include "SyncAPI.h"
|
||||
#include "TestFS.h"
|
||||
#include "index/StdLib.h"
|
||||
#include "clang/Basic/LangOptions.h"
|
||||
#include "clang/Basic/SourceManager.h"
|
||||
#include "gmock/gmock.h"
|
||||
#include "gtest/gtest.h"
|
||||
#include <memory>
|
||||
|
||||
using namespace testing;
|
||||
|
||||
namespace clang {
|
||||
namespace clangd {
|
||||
namespace {
|
||||
|
||||
// Check the generated header sources contains usual standard library headers.
|
||||
TEST(StdLibTests, getStdlibUmbrellaHeader) {
|
||||
LangOptions LO;
|
||||
LO.CPlusPlus = true;
|
||||
|
||||
auto CXX = getStdlibUmbrellaHeader(LO).str();
|
||||
EXPECT_THAT(CXX, HasSubstr("#include <string>"));
|
||||
EXPECT_THAT(CXX, HasSubstr("#include <cstdio>"));
|
||||
EXPECT_THAT(CXX, Not(HasSubstr("#include <stdio.h>")));
|
||||
|
||||
LO.CPlusPlus = false;
|
||||
auto C = getStdlibUmbrellaHeader(LO).str();
|
||||
EXPECT_THAT(C, Not(HasSubstr("#include <string>")));
|
||||
EXPECT_THAT(C, Not(HasSubstr("#include <cstdio>")));
|
||||
EXPECT_THAT(C, HasSubstr("#include <stdio.h>"));
|
||||
}
|
||||
|
||||
MATCHER_P(Named, Name, "") { return arg.Name == Name; }
|
||||
|
||||
// Build an index, and check if it contains the right symbols.
|
||||
TEST(StdLibTests, indexStandardLibrary) {
|
||||
MockFS FS;
|
||||
FS.Files["std/foo.h"] = R"cpp(
|
||||
#include <platform_stuff.h>
|
||||
#if __cplusplus >= 201703L
|
||||
int foo17();
|
||||
#elif __cplusplus >= 201402L
|
||||
int foo14();
|
||||
#else
|
||||
bool foo98();
|
||||
#endif
|
||||
)cpp";
|
||||
FS.Files["nonstd/platform_stuff.h"] = "int magic = 42;";
|
||||
|
||||
ParseInputs OriginalInputs;
|
||||
OriginalInputs.TFS = &FS;
|
||||
OriginalInputs.CompileCommand.Filename = testPath("main.cc");
|
||||
OriginalInputs.CompileCommand.CommandLine = {"clang++", testPath("main.cc"),
|
||||
"-isystemstd/",
|
||||
"-isystemnonstd/", "-std=c++14"};
|
||||
OriginalInputs.CompileCommand.Directory = testRoot();
|
||||
IgnoreDiagnostics Diags;
|
||||
auto CI = buildCompilerInvocation(OriginalInputs, Diags);
|
||||
ASSERT_TRUE(CI);
|
||||
|
||||
StdLibLocation Loc;
|
||||
Loc.Paths.push_back(testPath("std/"));
|
||||
|
||||
auto Symbols =
|
||||
indexStandardLibrary("#include <foo.h>", std::move(CI), Loc, FS);
|
||||
EXPECT_THAT(Symbols, ElementsAre(Named("foo14")));
|
||||
}
|
||||
|
||||
TEST(StdLibTests, StdLibSet) {
|
||||
StdLibSet Set;
|
||||
MockFS FS;
|
||||
FS.Files["std/_"] = "";
|
||||
FS.Files["libc/_"] = "";
|
||||
|
||||
auto Add = [&](const LangOptions &LO,
|
||||
std::vector<llvm::StringRef> SearchPath) {
|
||||
SourceManagerForFile SM("scratch", "");
|
||||
SM.get().getFileManager().setVirtualFileSystem(FS.view(llvm::None));
|
||||
HeaderSearch HS(/*HSOpts=*/nullptr, SM.get(), SM.get().getDiagnostics(), LO,
|
||||
/*Target=*/nullptr);
|
||||
for (auto P : SearchPath)
|
||||
HS.AddSearchPath(
|
||||
DirectoryLookup(
|
||||
cantFail(SM.get().getFileManager().getDirectoryRef(testPath(P))),
|
||||
SrcMgr::C_System, /*isFramework=*/false),
|
||||
true);
|
||||
return Set.add(LO, HS);
|
||||
};
|
||||
|
||||
Config Cfg;
|
||||
Cfg.Index.StandardLibrary = false;
|
||||
WithContextValue Disabled(Config::Key, std::move(Cfg));
|
||||
|
||||
LangOptions LO;
|
||||
LO.CPlusPlus = true;
|
||||
EXPECT_FALSE(Add(LO, {"std"})) << "Disabled in config";
|
||||
|
||||
Cfg = Config();
|
||||
Cfg.Index.StandardLibrary = true;
|
||||
WithContextValue Enabled(Config::Key, std::move(Cfg));
|
||||
|
||||
EXPECT_FALSE(Add(LO, {"std"})) << "No <vector> found";
|
||||
FS.Files["std/vector"] = "class vector;";
|
||||
EXPECT_TRUE(Add(LO, {"std"})) << "Indexing as C++98";
|
||||
EXPECT_FALSE(Add(LO, {"std"})) << "Don't reindex";
|
||||
LO.CPlusPlus11 = true;
|
||||
EXPECT_TRUE(Add(LO, {"std"})) << "Indexing as C++11";
|
||||
LO.CPlusPlus = false;
|
||||
EXPECT_FALSE(Add(LO, {"libc"})) << "No <stdio.h>";
|
||||
FS.Files["libc/stdio.h"] = true;
|
||||
EXPECT_TRUE(Add(LO, {"libc"})) << "Indexing as C";
|
||||
}
|
||||
|
||||
MATCHER_P(StdlibSymbol, Name, "") {
|
||||
return arg.Name == Name && arg.Includes.size() == 1 &&
|
||||
llvm::StringRef(arg.Includes.front().Header).startswith("<");
|
||||
}
|
||||
|
||||
TEST(StdLibTests, EndToEnd) {
|
||||
Config Cfg;
|
||||
Cfg.Index.StandardLibrary = true;
|
||||
WithContextValue Enabled(Config::Key, std::move(Cfg));
|
||||
|
||||
MockFS FS;
|
||||
FS.Files["stdlib/vector"] =
|
||||
"namespace std { template <class> class vector; }";
|
||||
FS.Files["stdlib/list"] =
|
||||
" namespace std { template <typename T> class list; }";
|
||||
MockCompilationDatabase CDB;
|
||||
CDB.ExtraClangFlags.push_back("-isystem" + testPath("stdlib"));
|
||||
ClangdServer::Options Opts = ClangdServer::optsForTest();
|
||||
Opts.BuildDynamicSymbolIndex = true; // also used for stdlib index
|
||||
ClangdServer Server(CDB, FS, Opts);
|
||||
|
||||
Annotations A("std::^");
|
||||
|
||||
Server.addDocument(testPath("foo.cc"), A.code());
|
||||
ASSERT_TRUE(Server.blockUntilIdleForTest());
|
||||
clangd::CodeCompleteOptions CCOpts;
|
||||
auto Completions =
|
||||
cantFail(runCodeComplete(Server, testPath("foo.cc"), A.point(), CCOpts));
|
||||
EXPECT_THAT(
|
||||
Completions.Completions,
|
||||
UnorderedElementsAre(StdlibSymbol("list"), StdlibSymbol("vector")));
|
||||
}
|
||||
|
||||
} // namespace
|
||||
} // namespace clangd
|
||||
} // namespace clang
|
|
@ -1123,8 +1123,7 @@ TEST_F(TUSchedulerTests, AsyncPreambleThread) {
|
|||
public:
|
||||
BlockPreambleThread(llvm::StringRef BlockVersion, Notification &N)
|
||||
: BlockVersion(BlockVersion), N(N) {}
|
||||
void onPreambleAST(PathRef Path, llvm::StringRef Version,
|
||||
const CompilerInvocation &, ASTContext &Ctx,
|
||||
void onPreambleAST(PathRef Path, llvm::StringRef Version, ASTContext &Ctx,
|
||||
Preprocessor &, const CanonicalIncludes &) override {
|
||||
if (Version == BlockVersion)
|
||||
N.wait();
|
||||
|
|
Loading…
Reference in New Issue