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
16namespace lld::macho {
17
18class UnwindInfoSection : public SyntheticSection {
19public:
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
26protected:
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
35UnwindInfoSection *makeUnwindInfoSection();
36
37} // namespace lld::macho
38
39#endif
40