1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef NOGROD_DWARF_CONTEXT_ 18 #define NOGROD_DWARF_CONTEXT_ 19 20 #include <cstdint> 21 #include <string> 22 23 #include <berberis/base/macros.h> 24 25 #include "byte_input_stream.h" 26 #include "string_offset_table.h" 27 #include "string_table.h" 28 29 namespace nogrod { 30 31 class DwarfContext { 32 public: DwarfContext(ByteInputStream * dwarf_info_stream,StringTable * debug_str_table,std::optional<StringOffsetTable> string_offset_table)33 DwarfContext(ByteInputStream* dwarf_info_stream, 34 StringTable* debug_str_table, 35 std::optional<StringOffsetTable> string_offset_table) 36 : dwarf_info_stream_{dwarf_info_stream}, 37 debug_str_table_{debug_str_table}, 38 string_offset_table_{std::move(string_offset_table)} {} 39 40 DwarfContext(const DwarfContext&) = delete; 41 const DwarfContext& operator=(const DwarfContext&) = delete; 42 DwarfContext(DwarfContext&&) = delete; 43 DwarfContext& operator=(DwarfContext&&) = delete; 44 debug_str_table()45 [[nodiscard]] const StringTable* debug_str_table() const { return debug_str_table_; } string_offset_table()46 [[nodiscard]] const std::optional<StringOffsetTable>& string_offset_table() const { 47 return string_offset_table_; 48 } 49 info_stream()50 [[nodiscard]] ByteInputStream* info_stream() { return dwarf_info_stream_; } 51 str_offsets_base()52 [[nodiscard]] std::optional<uint64_t> str_offsets_base() const { return str_offsets_base_; } 53 54 // DW_AT_str_offsets_base may be defined in Compilation Unit, in which case we set it here. SetStrOffsetsBase(uint64_t str_offsets_base)55 void SetStrOffsetsBase(uint64_t str_offsets_base) { str_offsets_base_ = str_offsets_base; } 56 // DW_AT_str_offsets_base is reset once new compilation unit starts ResetStrOffsetsBase()57 void ResetStrOffsetsBase() { str_offsets_base_.reset(); } 58 59 private: 60 ByteInputStream* dwarf_info_stream_; 61 StringTable* debug_str_table_; 62 std::optional<StringOffsetTable> string_offset_table_; 63 std::optional<uint64_t> str_offsets_base_{}; 64 }; 65 66 } // namespace nogrod 67 #endif // NOGROD_DWARF_CONTEXT_ 68