1 files changed, 264 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/SymbolFile/CTF/SymbolFileCTF.h b/contrib/llvm-project/lldb/source/Plugins/SymbolFile/CTF/SymbolFileCTF.h
new file mode 100644
index 000000000000..3a80138fffbc
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/SymbolFile/CTF/SymbolFileCTF.h
@@ -0,0 +1,264 @@
+//===-- SymbolFileCTF.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_SYMBOLFILE_CTF_SYMBOLFILECTF_H
+#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_CTF_SYMBOLFILECTF_H
+
+#include <map>
+#include <optional>
+#include <vector>
+
+#include "CTFTypes.h"
+#include "lldb/Symbol/CompileUnit.h"
+#include "lldb/Symbol/SymbolFile.h"
+
+namespace lldb_private {
+
+class SymbolFileCTF : public lldb_private::SymbolFileCommon {
+  /// LLVM RTTI support.
+  static char ID;
+
+public:
+  /// LLVM RTTI support.
+  /// \{
+  bool isA(const void *ClassID) const override {
+    return ClassID == &ID || SymbolFileCommon::isA(ClassID);
+  }
+  static bool classof(const SymbolFile *obj) { return obj->isA(&ID); }
+  /// \}
+
+  SymbolFileCTF(lldb::ObjectFileSP objfile_sp);
+
+  static void Initialize();
+
+  static void Terminate();
+
+  static llvm::StringRef GetPluginNameStatic() { return "CTF"; }
+
+  static llvm::StringRef GetPluginDescriptionStatic();
+
+  static lldb_private::SymbolFile *
+  CreateInstance(lldb::ObjectFileSP objfile_sp);
+
+  llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
+
+  uint32_t CalculateAbilities() override;
+
+  void InitializeObject() override;
+
+  lldb::LanguageType ParseLanguage(CompileUnit &comp_unit) override {
+    return lldb::eLanguageTypeUnknown;
+  }
+
+  bool ParseHeader();
+
+  size_t ParseFunctions(CompileUnit &comp_unit) override;
+
+  size_t ParseObjects(CompileUnit &comp_unit);
+
+  bool ParseLineTable(CompileUnit &comp_unit) override { return false; }
+
+  bool ParseDebugMacros(CompileUnit &comp_unit) override { return false; }
+
+  bool ParseSupportFiles(CompileUnit &comp_unit,
+                         SupportFileList &support_files) override {
+    return false;
+  }
+
+  size_t ParseTypes(CompileUnit &cu) override;
+
+  bool ParseImportedModules(
+      const SymbolContext &sc,
+      std::vector<lldb_private::SourceModule> &imported_modules) override {
+    return false;
+  }
+
+  size_t ParseBlocksRecursive(Function &func) override { return 0; }
+
+  size_t ParseVariablesForContext(const SymbolContext &sc) override;
+
+  uint32_t CalculateNumCompileUnits() override { return 0; }
+
+  lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t index) override;
+
+  Type *ResolveTypeUID(lldb::user_id_t type_uid) override;
+  std::optional<ArrayInfo> GetDynamicArrayInfoForUID(
+      lldb::user_id_t type_uid,
+      const lldb_private::ExecutionContext *exe_ctx) override {
+    return std::nullopt;
+  }
+
+  bool CompleteType(CompilerType &compiler_type) override;
+
+  uint32_t ResolveSymbolContext(const lldb_private::Address &so_addr,
+                                lldb::SymbolContextItem resolve_scope,
+                                lldb_private::SymbolContext &sc) override;
+
+  void AddSymbols(Symtab &symtab) override;
+
+  void GetTypes(lldb_private::SymbolContextScope *sc_scope,
+                lldb::TypeClass type_mask,
+                lldb_private::TypeList &type_list) override {}
+
+  void FindTypes(const lldb_private::TypeQuery &match,
+                 lldb_private::TypeResults &results) override;
+
+  void FindTypesByRegex(const lldb_private::RegularExpression &regex,
+                        uint32_t max_matches, lldb_private::TypeMap &types);
+
+  void FindFunctions(const lldb_private::Module::LookupInfo &lookup_info,
+                     const lldb_private::CompilerDeclContext &parent_decl_ctx,
+                     bool include_inlines,
+                     lldb_private::SymbolContextList &sc_list) override;
+
+  void FindFunctions(const lldb_private::RegularExpression &regex,
+                     bool include_inlines,
+                     lldb_private::SymbolContextList &sc_list) override;
+
+  void
+  FindGlobalVariables(lldb_private::ConstString name,
+                      const lldb_private::CompilerDeclContext &parent_decl_ctx,
+                      uint32_t max_matches,
+                      lldb_private::VariableList &variables) override;
+
+  void FindGlobalVariables(const lldb_private::RegularExpression &regex,
+                           uint32_t max_matches,
+                           lldb_private::VariableList &variables) override;
+
+  enum TypeKind : uint32_t {
+    eUnknown = 0,
+    eInteger = 1,
+    eFloat = 2,
+    ePointer = 3,
+    eArray = 4,
+    eFunction = 5,
+    eStruct = 6,
+    eUnion = 7,
+    eEnum = 8,
+    eForward = 9,
+    eTypedef = 10,
+    eVolatile = 11,
+    eConst = 12,
+    eRestrict = 13,
+    eSlice = 14,
+  };
+
+private:
+  enum Flags : uint32_t {
+    eFlagCompress = (1u << 0),
+    eFlagNewFuncInfo = (1u << 1),
+    eFlagIdxSorted = (1u << 2),
+    eFlagDynStr = (1u << 3),
+  };
+
+  enum IntEncoding : uint32_t {
+    eSigned = 0x1,
+    eChar = 0x2,
+    eBool = 0x4,
+    eVarArgs = 0x8,
+  };
+
+  struct ctf_preamble_t {
+    uint16_t magic;
+    uint8_t version;
+    uint8_t flags;
+  };
+
+  struct ctf_header_t {
+    ctf_preamble_t preamble;
+    uint32_t parlabel;
+    uint32_t parname;
+    uint32_t lbloff;
+    uint32_t objtoff;
+    uint32_t funcoff;
+    uint32_t typeoff;
+    uint32_t stroff;
+    uint32_t strlen;
+  };
+
+  struct ctf_type_t {
+    uint32_t name;
+    uint32_t info;
+    union {
+      uint32_t size;
+      uint32_t type;
+    };
+    uint32_t lsizehi;
+    uint32_t lsizelo;
+  };
+
+  struct ctf_stype_t {
+    uint32_t name;
+    uint32_t info;
+    union {
+      uint32_t size;
+      uint32_t type;
+    };
+
+    bool IsLargeType() const { return size == 0xffff; }
+    uint32_t GetStructSize() const {
+      if (IsLargeType())
+        return sizeof(ctf_type_t);
+      return sizeof(ctf_stype_t);
+    }
+    uint32_t GetType() const { return type; }
+    uint32_t GetSize() const { return size; }
+  };
+
+  llvm::Expected<std::unique_ptr<CTFType>> ParseType(lldb::offset_t &offset,
+                                                     lldb::user_id_t uid);
+
+  llvm::Expected<lldb::TypeSP> CreateType(CTFType *ctf_type);
+  llvm::Expected<lldb::TypeSP> CreateInteger(const CTFInteger &ctf_integer);
+  llvm::Expected<lldb::TypeSP> CreateModifier(const CTFModifier &ctf_modifier);
+  llvm::Expected<lldb::TypeSP> CreateTypedef(const CTFTypedef &ctf_typedef);
+  llvm::Expected<lldb::TypeSP> CreateArray(const CTFArray &ctf_array);
+  llvm::Expected<lldb::TypeSP> CreateEnum(const CTFEnum &ctf_enum);
+  llvm::Expected<lldb::TypeSP> CreateFunction(const CTFFunction &ctf_function);
+  llvm::Expected<lldb::TypeSP> CreateRecord(const CTFRecord &ctf_record);
+  llvm::Expected<lldb::TypeSP> CreateForward(const CTFForward &ctf_forward);
+
+  llvm::StringRef ReadString(lldb::offset_t offset) const;
+
+  std::vector<uint16_t> GetFieldSizes(lldb::offset_t field_offset,
+                                      uint32_t fields, uint32_t struct_size);
+
+  DataExtractor m_data;
+
+  /// The start offset of the CTF body into m_data. If the body is uncompressed,
+  /// m_data contains the header and the body and the body starts after the
+  /// header. If the body is compressed, m_data only contains the body and the
+  /// offset is zero.
+  lldb::offset_t m_body_offset = 0;
+
+  TypeSystemClang *m_ast;
+  lldb::CompUnitSP m_comp_unit_sp;
+
+  std::optional<ctf_header_t> m_header;
+
+  /// Parsed CTF types.
+  llvm::DenseMap<lldb::user_id_t, std::unique_ptr<CTFType>> m_ctf_types;
+
+  /// Parsed LLDB types.
+  llvm::DenseMap<lldb::user_id_t, lldb::TypeSP> m_types;
+
+  /// To complete types, we need a way to map (imcomplete) compiler types back
+  /// to parsed CTF types.
+  llvm::DenseMap<lldb::opaque_compiler_type_t, const CTFType *>
+      m_compiler_types;
+
+  std::vector<lldb::FunctionSP> m_functions;
+  std::vector<lldb::VariableSP> m_variables;
+
+  static constexpr uint16_t g_ctf_magic = 0xcff1;
+  static constexpr uint8_t g_ctf_version = 4;
+  static constexpr uint16_t g_ctf_field_threshold = 0x2000;
+};
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_CTF_SYMBOLFILECTF_H