| 1 | //===- UnwindInfoSection.h ------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef LLD_MACHO_UNWIND_INFO_H |
| 10 | #define LLD_MACHO_UNWIND_INFO_H |
| 11 | |
| 12 | #include "ConcatOutputSection.h" |
| 13 | #include "SyntheticSections.h" |
| 14 | #include "llvm/ADT/MapVector.h" |
| 15 | |
| 16 | namespace lld::macho { |
| 17 | |
| 18 | class UnwindInfoSection : public SyntheticSection { |
| 19 | public: |
| 20 | // If all functions are free of unwind info, we can omit the unwind info |
| 21 | // section entirely. |
| 22 | bool isNeeded() const override { return !allEntriesAreOmitted; } |
| 23 | void addSymbol(const Defined *); |
| 24 | virtual void prepare() = 0; |
| 25 | |
| 26 | protected: |
| 27 | UnwindInfoSection(); |
| 28 | |
| 29 | llvm::MapVector<std::pair<const InputSection *, uint64_t /*Defined::value*/>, |
| 30 | const Defined *> |
| 31 | symbols; |
| 32 | bool allEntriesAreOmitted = true; |
| 33 | }; |
| 34 | |
| 35 | UnwindInfoSection *makeUnwindInfoSection(); |
| 36 | |
| 37 | } // namespace lld::macho |
| 38 | |
| 39 | #endif |
| 40 |