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//===--- GlobalCompilationDatabase.cpp --------------------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===---------------------------------------------------------------------===//
#include "GlobalCompilationDatabase.h"
#include "Logger.h"
#include "clang/Tooling/CompilationDatabase.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
namespace clang {
namespace clangd {
tooling::CompileCommand
GlobalCompilationDatabase::getFallbackCommand(PathRef File) const {
std::vector<std::string> Argv = {"clang"};
// Clang treats .h files as C by default, resulting in unhelpful diagnostics.
// Parsing as Objective C++ is friendly to more cases.
if (llvm::sys::path::extension(File) == ".h")
Argv.push_back("-xobjective-c++-header");
Argv.push_back(File);
return tooling::CompileCommand(llvm::sys::path::parent_path(File),
llvm::sys::path::filename(File),
std::move(Argv),
/*Output=*/"");
}
DirectoryBasedGlobalCompilationDatabase::
DirectoryBasedGlobalCompilationDatabase(
llvm::Optional<Path> CompileCommandsDir)
: CompileCommandsDir(std::move(CompileCommandsDir)) {}
DirectoryBasedGlobalCompilationDatabase::
~DirectoryBasedGlobalCompilationDatabase() = default;
llvm::Optional<tooling::CompileCommand>
DirectoryBasedGlobalCompilationDatabase::getCompileCommand(PathRef File) const {
if (auto CDB = getCDBForFile(File)) {
auto Candidates = CDB->getCompileCommands(File);
if (!Candidates.empty()) {
addExtraFlags(File, Candidates.front());
return std::move(Candidates.front());
}
} else {
log("Failed to find compilation database for {0}", File);
}
return llvm::None;
}
tooling::CompileCommand
DirectoryBasedGlobalCompilationDatabase::getFallbackCommand(
PathRef File) const {
auto C = GlobalCompilationDatabase::getFallbackCommand(File);
addExtraFlags(File, C);
return C;
}
void DirectoryBasedGlobalCompilationDatabase::setCompileCommandsDir(Path P) {
std::lock_guard<std::mutex> Lock(Mutex);
CompileCommandsDir = P;
CompilationDatabases.clear();
}
void DirectoryBasedGlobalCompilationDatabase::setExtraFlagsForFile(
PathRef File, std::vector<std::string> ExtraFlags) {
std::lock_guard<std::mutex> Lock(Mutex);
ExtraFlagsForFile[File] = std::move(ExtraFlags);
}
void DirectoryBasedGlobalCompilationDatabase::addExtraFlags(
PathRef File, tooling::CompileCommand &C) const {
std::lock_guard<std::mutex> Lock(Mutex);
auto It = ExtraFlagsForFile.find(File);
if (It == ExtraFlagsForFile.end())
return;
auto &Args = C.CommandLine;
assert(Args.size() >= 2 && "Expected at least [compiler, source file]");
// The last argument of CommandLine is the name of the input file.
// Add ExtraFlags before it.
Args.insert(Args.end() - 1, It->second.begin(), It->second.end());
}
tooling::CompilationDatabase *
DirectoryBasedGlobalCompilationDatabase::getCDBInDirLocked(PathRef Dir) const {
// FIXME(ibiryukov): Invalidate cached compilation databases on changes
auto CachedIt = CompilationDatabases.find(Dir);
if (CachedIt != CompilationDatabases.end())
return CachedIt->second.get();
std::string Error = "";
auto CDB = tooling::CompilationDatabase::loadFromDirectory(Dir, Error);
if (CDB)
CDB = tooling::inferMissingCompileCommands(std::move(CDB));
auto Result = CDB.get();
CompilationDatabases.insert(std::make_pair(Dir, std::move(CDB)));
return Result;
}
tooling::CompilationDatabase *
DirectoryBasedGlobalCompilationDatabase::getCDBForFile(PathRef File) const {
namespace path = llvm::sys::path;
assert((path::is_absolute(File, path::Style::posix) ||
path::is_absolute(File, path::Style::windows)) &&
"path must be absolute");
std::lock_guard<std::mutex> Lock(Mutex);
if (CompileCommandsDir)
return getCDBInDirLocked(*CompileCommandsDir);
for (auto Path = path::parent_path(File); !Path.empty();
Path = path::parent_path(Path))
if (auto CDB = getCDBInDirLocked(Path))
return CDB;
return nullptr;
}
CachingCompilationDb::CachingCompilationDb(
const GlobalCompilationDatabase &InnerCDB)
: InnerCDB(InnerCDB) {}
llvm::Optional<tooling::CompileCommand>
CachingCompilationDb::getCompileCommand(PathRef File) const {
std::unique_lock<std::mutex> Lock(Mut);
auto It = Cached.find(File);
if (It != Cached.end())
return It->second;
Lock.unlock();
llvm::Optional<tooling::CompileCommand> Command =
InnerCDB.getCompileCommand(File);
Lock.lock();
return Cached.try_emplace(File, std::move(Command)).first->getValue();
}
tooling::CompileCommand
CachingCompilationDb::getFallbackCommand(PathRef File) const {
return InnerCDB.getFallbackCommand(File);
}
void CachingCompilationDb::invalidate(PathRef File) {
std::unique_lock<std::mutex> Lock(Mut);
Cached.erase(File);
}
void CachingCompilationDb::clear() {
std::unique_lock<std::mutex> Lock(Mut);
Cached.clear();
}
llvm::Optional<tooling::CompileCommand>
InMemoryCompilationDb::getCompileCommand(PathRef File) const {
std::lock_guard<std::mutex> Lock(Mutex);
auto It = Commands.find(File);
if (It == Commands.end())
return None;
return It->second;
}
bool InMemoryCompilationDb::setCompilationCommandForFile(
PathRef File, tooling::CompileCommand CompilationCommand) {
std::unique_lock<std::mutex> Lock(Mutex);
auto ItInserted = Commands.insert(std::make_pair(File, CompilationCommand));
if (ItInserted.second)
return true;
ItInserted.first->setValue(std::move(CompilationCommand));
return false;
}
void InMemoryCompilationDb::invalidate(PathRef File) {
std::unique_lock<std::mutex> Lock(Mutex);
Commands.erase(File);
}
} // namespace clangd
} // namespace clang
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