1 /* 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef PANDA_DWARF_BUILDER_H 17 #define PANDA_DWARF_BUILDER_H 18 19 #include "utils/arch.h" 20 #include "utils/span.h" 21 22 #ifdef PANDA_COMPILER_DEBUG_INFO 23 #include <libdwarf/libdwarf.h> 24 #endif 25 26 #include "elfio/elfio.hpp" 27 28 #include <string> 29 #include <unordered_map> 30 31 namespace panda::irtoc { 32 class Function; 33 34 class DwarfBuilder { 35 public: 36 struct Section { 37 std::string name; 38 unsigned type; 39 unsigned flags; 40 unsigned link; 41 unsigned info; 42 std::vector<uint8_t> data; 43 }; 44 45 enum class SectionKind { DEBUG_LINE = 1, REL_DEBUG_LINE }; 46 47 DwarfBuilder(Arch arch, ELFIO::elfio *elf); 48 49 bool BuildGraph(const Function *func, uint32_t codeOffset, unsigned symbol); 50 51 bool Finalize(uint32_t codeSize); 52 53 Dwarf_Unsigned AddFile(const std::string &fname, Dwarf_Unsigned dirIndex); 54 55 Dwarf_Unsigned AddDir(const std::string &dname); 56 GetArch()57 Arch GetArch() 58 { 59 return arch_; 60 } 61 GetElfBuilder()62 ELFIO::elfio *GetElfBuilder() 63 { 64 return elfBuilder_; 65 } 66 67 static int CreateSectionCallback([[maybe_unused]] char *name, [[maybe_unused]] int size, 68 [[maybe_unused]] Dwarf_Unsigned type, [[maybe_unused]] Dwarf_Unsigned flags, 69 [[maybe_unused]] Dwarf_Unsigned link, [[maybe_unused]] Dwarf_Unsigned info, 70 [[maybe_unused]] Dwarf_Unsigned *sectNameIndex, [[maybe_unused]] void *userData, 71 [[maybe_unused]] int *error); 72 73 private: 74 std::vector<ELFIO::section *> sections_; 75 std::unordered_map<std::string, Dwarf_Unsigned> sourceFilesMap_; 76 std::unordered_map<std::string, Dwarf_Unsigned> dirsMap_; 77 std::unordered_map<unsigned, unsigned> indexMap_; 78 std::unordered_map<unsigned, ELFIO::relocation_section_accessor> relMap_; 79 80 ELFIO::elfio *elfBuilder_ {nullptr}; 81 Dwarf_P_Debug dwarf_ {nullptr}; 82 Dwarf_P_Die compileUnitDie_ {nullptr}; 83 Dwarf_P_Die prevProgramDie_ {nullptr}; 84 uint32_t codeSize_ {0}; 85 Arch arch_; 86 }; 87 } // namespace panda::irtoc 88 89 #endif // PANDA_DWARF_BUILDER_H 90