1 files changed, 119 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangPersistentVariables.h b/contrib/llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangPersistentVariables.h
new file mode 100644
index 000000000000..abeb431ccc08
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+++ b/contrib/llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangPersistentVariables.h
@@ -0,0 +1,119 @@
+//===-- ClangPersistentVariables.h ------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_EXPRESSIONPARSER_CLANG_CLANGPERSISTENTVARIABLES_H
+#define LLDB_SOURCE_PLUGINS_EXPRESSIONPARSER_CLANG_CLANGPERSISTENTVARIABLES_H
+
+#include "llvm/ADT/DenseMap.h"
+
+#include "ClangExpressionVariable.h"
+#include "ClangModulesDeclVendor.h"
+
+#include "lldb/Expression/ExpressionVariable.h"
+#include <optional>
+
+namespace lldb_private {
+
+class ClangASTImporter;
+class ClangModulesDeclVendor;
+class Target;
+class TypeSystemClang;
+
+/// \class ClangPersistentVariables ClangPersistentVariables.h
+/// "lldb/Expression/ClangPersistentVariables.h" Manages persistent values
+/// that need to be preserved between expression invocations.
+///
+/// A list of variables that can be accessed and updated by any expression.  See
+/// ClangPersistentVariable for more discussion.  Also provides an increasing,
+/// 0-based counter for naming result variables.
+class ClangPersistentVariables
+    : public llvm::RTTIExtends<ClangPersistentVariables,
+                               PersistentExpressionState> {
+public:
+  // LLVM RTTI support
+  static char ID;
+
+  ClangPersistentVariables(std::shared_ptr<Target> target_sp);
+
+  ~ClangPersistentVariables() override = default;
+
+  std::shared_ptr<ClangASTImporter> GetClangASTImporter();
+  std::shared_ptr<ClangModulesDeclVendor> GetClangModulesDeclVendor();
+
+  lldb::ExpressionVariableSP
+  CreatePersistentVariable(const lldb::ValueObjectSP &valobj_sp) override;
+
+  lldb::ExpressionVariableSP CreatePersistentVariable(
+      ExecutionContextScope *exe_scope, ConstString name,
+      const CompilerType &compiler_type, lldb::ByteOrder byte_order,
+      uint32_t addr_byte_size) override;
+
+  void RemovePersistentVariable(lldb::ExpressionVariableSP variable) override;
+
+  ConstString GetNextPersistentVariableName(bool is_error = false) override;
+
+  /// Returns the next file name that should be used for user expressions.
+  std::string GetNextExprFileName() {
+    std::string name;
+    name.append("<user expression ");
+    name.append(std::to_string(m_next_user_file_id++));
+    name.append(">");
+    return name;
+  }
+
+  std::optional<CompilerType>
+  GetCompilerTypeFromPersistentDecl(ConstString type_name) override;
+
+  void RegisterPersistentDecl(ConstString name, clang::NamedDecl *decl,
+                              std::shared_ptr<TypeSystemClang> ctx);
+
+  clang::NamedDecl *GetPersistentDecl(ConstString name);
+
+  void AddHandLoadedClangModule(ClangModulesDeclVendor::ModuleID module) {
+    m_hand_loaded_clang_modules.push_back(module);
+  }
+
+  const ClangModulesDeclVendor::ModuleVector &GetHandLoadedClangModules() {
+    return m_hand_loaded_clang_modules;
+  }
+
+protected:
+  llvm::StringRef
+  GetPersistentVariablePrefix(bool is_error = false) const override {
+    return "$";
+  }
+
+private:
+  /// The counter used by GetNextExprFileName.
+  uint32_t m_next_user_file_id = 0;
+  // The counter used by GetNextPersistentVariableName
+  uint32_t m_next_persistent_variable_id = 0;
+
+  struct PersistentDecl {
+    /// The persistent decl.
+    clang::NamedDecl *m_decl = nullptr;
+    /// The TypeSystemClang for the ASTContext of m_decl.
+    lldb::TypeSystemWP m_context;
+  };
+
+  typedef llvm::DenseMap<const char *, PersistentDecl> PersistentDeclMap;
+  PersistentDeclMap
+      m_persistent_decls; ///< Persistent entities declared by the user.
+
+  ClangModulesDeclVendor::ModuleVector
+      m_hand_loaded_clang_modules; ///< These are Clang modules we hand-loaded;
+                                   ///these are the highest-
+                                   ///< priority source for macros.
+  std::shared_ptr<ClangASTImporter> m_ast_importer_sp;
+  std::shared_ptr<ClangModulesDeclVendor> m_modules_decl_vendor_sp;
+  std::shared_ptr<Target> m_target_sp;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_EXPRESSIONPARSER_CLANG_CLANGPERSISTENTVARIABLES_H