//===-- CppModuleConfiguration.cpp ----------------------------------------===// // // 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 "CppModuleConfiguration.h" #include "ClangHost.h" #include "lldb/Host/FileSystem.h" using namespace lldb_private; bool CppModuleConfiguration::SetOncePath::TrySet(llvm::StringRef path) { // Setting for the first time always works. if (m_first) { m_path = path.str(); m_valid = true; m_first = false; return true; } // Changing the path to the same value is fine. if (m_path == path) return true; // Changing the path after it was already set is not allowed. m_valid = false; return false; } bool CppModuleConfiguration::analyzeFile(const FileSpec &f) { using namespace llvm::sys::path; // Convert to slashes to make following operations simpler. std::string dir_buffer = convert_to_slash(f.GetDirectory().GetStringRef()); llvm::StringRef posix_dir(dir_buffer); // Check for /c++/vX/ that is used by libc++. static llvm::Regex libcpp_regex(R"regex(/c[+][+]/v[0-9]/)regex"); if (libcpp_regex.match(f.GetPath())) { // Strip away libc++'s /experimental directory if there is one. posix_dir.consume_back("/experimental"); return m_std_inc.TrySet(posix_dir); } // Check for /usr/include. On Linux this might be /usr/include/bits, so // we should remove that '/bits' suffix to get the actual include directory. if (posix_dir.endswith("/usr/include/bits")) posix_dir.consume_back("/bits"); if (posix_dir.endswith("/usr/include")) return m_c_inc.TrySet(posix_dir); // File wasn't interesting, continue analyzing. return true; } bool CppModuleConfiguration::hasValidConfig() { // We all these include directories to have a valid usable configuration. return m_c_inc.Valid() && m_std_inc.Valid(); } CppModuleConfiguration::CppModuleConfiguration( const FileSpecList &support_files) { // Analyze all files we were given to build the configuration. bool error = !llvm::all_of(support_files, std::bind(&CppModuleConfiguration::analyzeFile, this, std::placeholders::_1)); // If we have a valid configuration at this point, set the // include directories and module list that should be used. if (!error && hasValidConfig()) { // Calculate the resource directory for LLDB. llvm::SmallString<256> resource_dir; llvm::sys::path::append(resource_dir, GetClangResourceDir().GetPath(), "include"); m_resource_inc = std::string(resource_dir.str()); // This order matches the way Clang orders these directories. m_include_dirs = {m_std_inc.Get(), m_resource_inc, m_c_inc.Get()}; m_imported_modules = {"std"}; } }