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-rw-r--r--source/Plugins/ExpressionParser/Clang/CppModuleConfiguration.cpp82
1 files changed, 82 insertions, 0 deletions
diff --git a/source/Plugins/ExpressionParser/Clang/CppModuleConfiguration.cpp b/source/Plugins/ExpressionParser/Clang/CppModuleConfiguration.cpp
new file mode 100644
index 000000000000..51ae73285b53
--- /dev/null
+++ b/source/Plugins/ExpressionParser/Clang/CppModuleConfiguration.cpp
@@ -0,0 +1,82 @@
+//===-- 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 = 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"};
+ }
+}