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