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Add PreambleStatCache

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This commit is contained in:
Fangrui Song 2018-10-02 17:34:02 -07:00
parent 29f05d96fb
commit fc8a60c630
2 changed files with 148 additions and 54 deletions
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192
src/clang_complete.cc
View File

@ -37,7 +37,99 @@ using namespace llvm;
#include <thread>
namespace chrono = std::chrono;
#if LLVM_VERSION_MAJOR < 8
namespace clang::vfs {
struct ProxyFileSystem : FileSystem {
explicit ProxyFileSystem(IntrusiveRefCntPtr<FileSystem> FS)
: FS(std::move(FS)) {}
llvm::ErrorOr<Status> status(const Twine &Path) override {
return FS->status(Path);
}
llvm::ErrorOr<std::unique_ptr<File>>
openFileForRead(const Twine &Path) override {
return FS->openFileForRead(Path);
}
directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override {
return FS->dir_begin(Dir, EC);
}
llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override {
return FS->getCurrentWorkingDirectory();
}
std::error_code setCurrentWorkingDirectory(const Twine &Path) override {
return FS->setCurrentWorkingDirectory(Path);
}
#if LLVM_VERSION_MAJOR == 7
std::error_code getRealPath(const Twine &Path,
SmallVectorImpl<char> &Output) const override {
return FS->getRealPath(Path, Output);
}
#endif
FileSystem &getUnderlyingFS() { return *FS; }
IntrusiveRefCntPtr<FileSystem> FS;
};
}
#endif
namespace ccls {
struct PreambleStatCache {
llvm::StringMap<ErrorOr<vfs::Status>> Cache;
void Update(Twine Path, ErrorOr<vfs::Status> S) {
Cache.try_emplace(Path.str(), std::move(S));
}
IntrusiveRefCntPtr<vfs::FileSystem>
Producer(IntrusiveRefCntPtr<vfs::FileSystem> FS) {
struct VFS : vfs::ProxyFileSystem {
PreambleStatCache &Cache;
VFS(IntrusiveRefCntPtr<vfs::FileSystem> FS, PreambleStatCache &Cache)
: ProxyFileSystem(std::move(FS)), Cache(Cache) {}
llvm::ErrorOr<std::unique_ptr<vfs::File>>
openFileForRead(const Twine &Path) override {
auto File = getUnderlyingFS().openFileForRead(Path);
if (!File || !*File)
return File;
Cache.Update(Path, File->get()->status());
return File;
}
llvm::ErrorOr<vfs::Status> status(const Twine &Path) override {
auto S = getUnderlyingFS().status(Path);
Cache.Update(Path, S);
return S;
}
};
return new VFS(std::move(FS), *this);
}
IntrusiveRefCntPtr<vfs::FileSystem>
Consumer(IntrusiveRefCntPtr<vfs::FileSystem> FS) {
struct VFS : vfs::ProxyFileSystem {
const PreambleStatCache &Cache;
VFS(IntrusiveRefCntPtr<vfs::FileSystem> FS,
const PreambleStatCache &Cache)
: ProxyFileSystem(std::move(FS)), Cache(Cache) {}
llvm::ErrorOr<vfs::Status> status(const Twine &Path) override {
auto I = Cache.Cache.find(Path.str());
if (I != Cache.Cache.end())
return I->getValue();
return getUnderlyingFS().status(Path);
}
};
return new VFS(std::move(FS), *this);
}
};
struct PreambleData {
PreambleData(clang::PrecompiledPreamble P, std::vector<Diag> diags,
std::unique_ptr<PreambleStatCache> stat_cache)
: Preamble(std::move(P)), diags(std::move(diags)),
stat_cache(std::move(stat_cache)) {}
clang::PrecompiledPreamble Preamble;
std::vector<Diag> diags;
std::unique_ptr<PreambleStatCache> stat_cache;
};
namespace {
std::string StripFileType(const std::string &path) {
@ -172,31 +264,29 @@ public:
std::unique_ptr<CompilerInstance> BuildCompilerInstance(
CompletionSession &session, std::unique_ptr<CompilerInvocation> CI,
DiagnosticConsumer &DC, const WorkingFiles::Snapshot &snapshot,
IntrusiveRefCntPtr<vfs::FileSystem> FS, DiagnosticConsumer &DC,
const PreambleData *preamble, const WorkingFiles::Snapshot &snapshot,
std::vector<std::unique_ptr<llvm::MemoryBuffer>> &Bufs) {
std::string main = ResolveIfRelative(
session.file.directory,
sys::path::convert_to_slash(CI->getFrontendOpts().Inputs[0].getFile()));
for (auto &file : snapshot.files) {
Bufs.push_back(llvm::MemoryBuffer::getMemBuffer(file.content));
if (file.filename == main)
if (auto Preamble = session.GetPreamble()) {
if (preamble && file.filename == main) {
#if LLVM_VERSION_MAJOR >= 7
Preamble->Preamble.OverridePreamble(*CI, session.FS,
Bufs.back().get());
preamble->Preamble.OverridePreamble(*CI, FS, Bufs.back().get());
#else
Preamble->Preamble.AddImplicitPreamble(*CI, session.FS,
Bufs.back().get());
preamble->Preamble.AddImplicitPreamble(*CI, FS, Bufs.back().get());
#endif
continue;
}
continue;
}
CI->getPreprocessorOpts().addRemappedFile(file.filename,
Bufs.back().get());
}
auto Clang = std::make_unique<CompilerInstance>(session.PCH);
Clang->setInvocation(std::move(CI));
Clang->setVirtualFileSystem(session.FS);
Clang->setVirtualFileSystem(FS);
Clang->createDiagnostics(&DC, false);
Clang->setTarget(TargetInfo::CreateTargetInfo(
Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
@ -221,6 +311,36 @@ bool Parse(CompilerInstance &Clang) {
return true;
}
void BuildPreamble(CompletionSession &session, CompilerInvocation &CI,
IntrusiveRefCntPtr<vfs::FileSystem> FS,
const std::string &main,
std::unique_ptr<PreambleStatCache> stat_cache) {
std::shared_ptr<PreambleData> OldP = session.GetPreamble();
std::string content = session.wfiles->GetContent(main);
std::unique_ptr<llvm::MemoryBuffer> Buf =
llvm::MemoryBuffer::getMemBuffer(content);
auto Bounds = ComputePreambleBounds(*CI.getLangOpts(), Buf.get(), 0);
if (OldP && OldP->Preamble.CanReuse(CI, Buf.get(), Bounds, FS.get()))
return;
CI.getDiagnosticOpts().IgnoreWarnings = false;
CI.getFrontendOpts().SkipFunctionBodies = true;
CI.getLangOpts()->CommentOpts.ParseAllComments = true;
#if LLVM_VERSION_MAJOR >= 7
CI.getPreprocessorOpts().WriteCommentListToPCH = false;
#endif
StoreDiags DC(main);
IntrusiveRefCntPtr<DiagnosticsEngine> DE =
CompilerInstance::createDiagnostics(&CI.getDiagnosticOpts(), &DC, false);
PreambleCallbacks PP;
if (auto NewPreamble = PrecompiledPreamble::Build(
CI, Buf.get(), Bounds, *DE, FS, session.PCH, true, PP)) {
std::lock_guard lock(session.mutex);
session.preamble = std::make_shared<PreambleData>(
std::move(*NewPreamble), DC.Take(), std::move(stat_cache));
}
}
void *CompletionPreloadMain(void *manager_) {
auto *manager = static_cast<CompletionManager*>(manager_);
set_thread_name("comp-preload");
@ -236,9 +356,11 @@ void *CompletionPreloadMain(void *manager_) {
const auto &args = session->file.args;
WorkingFiles::Snapshot snapshot =
session->wfiles->AsSnapshot({StripFileType(session->file.filename)});
auto stat_cache = std::make_unique<PreambleStatCache>();
IntrusiveRefCntPtr<vfs::FileSystem> FS = stat_cache->Producer(session->FS);
if (std::unique_ptr<CompilerInvocation> CI =
BuildCompilerInvocation(args, session->FS))
session->BuildPreamble(*CI, request.path);
BuildCompilerInvocation(args, FS))
BuildPreamble(*session, *CI, FS, request.path, std::move(stat_cache));
int debounce =
is_open ? g_config->diagnostics.onOpen : g_config->diagnostics.onSave;
@ -272,9 +394,11 @@ void *CompletionMain(void *manager_) {
std::shared_ptr<CompletionSession> session =
manager->TryGetSession(path, false);
std::shared_ptr<PreambleData> preamble = session->GetPreamble();
IntrusiveRefCntPtr<vfs::FileSystem> FS =
preamble ? preamble->stat_cache->Consumer(session->FS) : session->FS;
std::unique_ptr<CompilerInvocation> CI =
BuildCompilerInvocation(session->file.args, session->FS);
BuildCompilerInvocation(session->file.args, FS);
if (!CI)
continue;
auto &FOpts = CI->getFrontendOpts();
@ -289,7 +413,8 @@ void *CompletionMain(void *manager_) {
WorkingFiles::Snapshot snapshot =
manager->working_files_->AsSnapshot({StripFileType(path)});
std::vector<std::unique_ptr<llvm::MemoryBuffer>> Bufs;
auto Clang = BuildCompilerInstance(*session, std::move(CI), DC, snapshot, Bufs);
auto Clang = BuildCompilerInstance(*session, std::move(CI), FS, DC,
preamble.get(), snapshot, Bufs);
if (!Clang)
continue;
@ -349,9 +474,11 @@ void *DiagnosticMain(void *manager_) {
std::shared_ptr<CompletionSession> session =
manager->TryGetSession(path, false);
std::shared_ptr<PreambleData> preamble = session->GetPreamble();
IntrusiveRefCntPtr<vfs::FileSystem> FS =
preamble ? preamble->stat_cache->Consumer(session->FS) : session->FS;
std::unique_ptr<CompilerInvocation> CI =
BuildCompilerInvocation(session->file.args, session->FS);
BuildCompilerInvocation(session->file.args, FS);
if (!CI)
continue;
CI->getDiagnosticOpts().IgnoreWarnings = false;
@ -360,7 +487,8 @@ void *DiagnosticMain(void *manager_) {
WorkingFiles::Snapshot snapshot =
manager->working_files_->AsSnapshot({StripFileType(path)});
std::vector<std::unique_ptr<llvm::MemoryBuffer>> Bufs;
auto Clang = BuildCompilerInstance(*session, std::move(CI), DC, snapshot, Bufs);
auto Clang = BuildCompilerInstance(*session, std::move(CI), FS, DC,
preamble.get(), snapshot, Bufs);
if (!Clang)
continue;
if (!Parse(*Clang))
@ -440,34 +568,6 @@ std::shared_ptr<PreambleData> CompletionSession::GetPreamble() {
return preamble;
}
void CompletionSession::BuildPreamble(CompilerInvocation &CI,
const std::string &main) {
std::shared_ptr<PreambleData> OldP = GetPreamble();
std::string content = wfiles->GetContent(main);
std::unique_ptr<llvm::MemoryBuffer> Buf =
llvm::MemoryBuffer::getMemBuffer(content);
auto Bounds = ComputePreambleBounds(*CI.getLangOpts(), Buf.get(), 0);
if (OldP && OldP->Preamble.CanReuse(CI, Buf.get(), Bounds, FS.get()))
return;
CI.getDiagnosticOpts().IgnoreWarnings = false;
CI.getFrontendOpts().SkipFunctionBodies = true;
CI.getLangOpts()->CommentOpts.ParseAllComments = true;
#if LLVM_VERSION_MAJOR >= 7
CI.getPreprocessorOpts().WriteCommentListToPCH = false;
#endif
StoreDiags DC(main);
IntrusiveRefCntPtr<DiagnosticsEngine> DE =
CompilerInstance::createDiagnostics(&CI.getDiagnosticOpts(), &DC, false);
PreambleCallbacks PP;
if (auto NewPreamble = PrecompiledPreamble::Build(CI, Buf.get(), Bounds,
*DE, FS, PCH, true, PP)) {
std::lock_guard<std::mutex> lock(mutex);
preamble =
std::make_shared<PreambleData>(std::move(*NewPreamble), DC.Take());
}
}
} // namespace ccls
CompletionManager::CompletionManager(Project *project,

10
src/clang_complete.hh
View File

@ -33,6 +33,8 @@ limitations under the License.
#include <string>
namespace ccls {
struct PreambleData;
struct DiagBase {
Range range;
std::string message;
@ -47,13 +49,6 @@ struct Diag : DiagBase {
std::vector<lsTextEdit> edits;
};
struct PreambleData {
PreambleData(clang::PrecompiledPreamble P, std::vector<Diag> diags)
: Preamble(std::move(P)), diags(std::move(diags)) {}
clang::PrecompiledPreamble Preamble;
std::vector<Diag> diags;
};
struct CompletionSession
: public std::enable_shared_from_this<CompletionSession> {
std::mutex mutex;
@ -73,7 +68,6 @@ struct CompletionSession
: file(file), wfiles(wfiles), PCH(PCH) {}
std::shared_ptr<PreambleData> GetPreamble();
void BuildPreamble(clang::CompilerInvocation &CI, const std::string &main);
};
}