| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_DEVELOPER_DEBUG_ZXDB_SYMBOLS_DWARF_UNIT_IMPL_H_ |
| #define SRC_DEVELOPER_DEBUG_ZXDB_SYMBOLS_DWARF_UNIT_IMPL_H_ |
| |
| #include "src/developer/debug/zxdb/symbols/dwarf_unit.h" |
| #include "src/developer/debug/zxdb/symbols/line_table_impl.h" |
| #include "src/lib/fxl/memory/weak_ptr.h" |
| |
| namespace llvm { |
| class DWARFDie; |
| class DWARFUnit; |
| } // namespace llvm |
| |
| namespace zxdb { |
| |
| class DwarfBinaryImpl; |
| |
| class DwarfUnitImpl : public DwarfUnit { |
| public: |
| // Construct with fxl::MakeRefCounted<DwarfUnitImpl>(). |
| |
| llvm::DWARFUnit* unit() const { return unit_; } |
| |
| // DwarfUnit implementation. |
| llvm::DWARFDie FunctionForRelativeAddress(uint64_t relative_address) const override; |
| std::string GetCompilationDir() const override; |
| const LineTable& GetLineTable() const override; |
| const llvm::DWARFDebugLine::LineTable* GetLLVMLineTable() const override; |
| |
| private: |
| FRIEND_REF_COUNTED_THREAD_SAFE(DwarfUnitImpl); |
| FRIEND_MAKE_REF_COUNTED(DwarfUnitImpl); |
| |
| DwarfUnitImpl(DwarfBinaryImpl* binary, llvm::DWARFUnit* unit); |
| |
| // The binary that owns us. |
| fxl::WeakPtr<DwarfBinaryImpl> binary_; |
| |
| // This pointer is owned by LLVM's DWARFContext object. Integrating LLVM's memory model with ours |
| // here is a bit messy. In practice this means that the DwarfBinary outlives all DwarfUnits, and |
| // users should check that the binary_ is still valid before dereferencing. |
| llvm::DWARFUnit* unit_; |
| |
| // The line table. Computed lazily. |
| mutable std::optional<LineTableImpl> line_table_; |
| }; |
| |
| } // namespace zxdb |
| |
| #endif // SRC_DEVELOPER_DEBUG_ZXDB_SYMBOLS_DWARF_UNIT_IMPL_H_ |