| 1 | //===- StringEntryToDwarfStringPoolEntryMap.h -------------------*- C++ -*-===// |
|---|---|
| 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 LLVM_LIB_DWARFLINKER_PARALLEL_STRINGENTRYTODWARFSTRINGPOOLENTRYMAP_H |
| 10 | #define LLVM_LIB_DWARFLINKER_PARALLEL_STRINGENTRYTODWARFSTRINGPOOLENTRYMAP_H |
| 11 | |
| 12 | #include "DWARFLinkerGlobalData.h" |
| 13 | #include "llvm/ADT/SmallVector.h" |
| 14 | #include "llvm/DWARFLinker/StringPool.h" |
| 15 | |
| 16 | namespace llvm { |
| 17 | namespace dwarf_linker { |
| 18 | namespace parallel { |
| 19 | |
| 20 | /// This class creates a DwarfStringPoolEntry for the corresponding StringEntry. |
| 21 | class StringEntryToDwarfStringPoolEntryMap { |
| 22 | public: |
| 23 | StringEntryToDwarfStringPoolEntryMap(LinkingGlobalData &GlobalData) |
| 24 | : GlobalData(GlobalData) {} |
| 25 | ~StringEntryToDwarfStringPoolEntryMap() {} |
| 26 | |
| 27 | /// Create DwarfStringPoolEntry for specified StringEntry if necessary. |
| 28 | /// Initialize DwarfStringPoolEntry with initial values. |
| 29 | DwarfStringPoolEntryWithExtString *add(const StringEntry *String) { |
| 30 | DwarfStringPoolEntriesTy::iterator it = DwarfStringPoolEntries.find(Val: String); |
| 31 | |
| 32 | if (it == DwarfStringPoolEntries.end()) { |
| 33 | DwarfStringPoolEntryWithExtString *DataPtr = |
| 34 | GlobalData.getAllocator() |
| 35 | .Allocate<DwarfStringPoolEntryWithExtString>(); |
| 36 | DataPtr->String = String->getKey(); |
| 37 | DataPtr->Index = DwarfStringPoolEntry::NotIndexed; |
| 38 | DataPtr->Offset = 0; |
| 39 | DataPtr->Symbol = nullptr; |
| 40 | it = DwarfStringPoolEntries.insert(KV: std::make_pair(x&: String, y&: DataPtr)).first; |
| 41 | } |
| 42 | |
| 43 | assert(it->second != nullptr); |
| 44 | return it->second; |
| 45 | } |
| 46 | |
| 47 | /// Returns already existed DwarfStringPoolEntry for the specified |
| 48 | /// StringEntry. |
| 49 | DwarfStringPoolEntryWithExtString * |
| 50 | getExistingEntry(const StringEntry *String) const { |
| 51 | DwarfStringPoolEntriesTy::const_iterator it = |
| 52 | DwarfStringPoolEntries.find(Val: String); |
| 53 | |
| 54 | assert(it != DwarfStringPoolEntries.end()); |
| 55 | assert(it->second != nullptr); |
| 56 | return it->second; |
| 57 | } |
| 58 | |
| 59 | /// Erase contents of StringsForEmission. |
| 60 | void clear() { DwarfStringPoolEntries.clear(); } |
| 61 | |
| 62 | protected: |
| 63 | using DwarfStringPoolEntriesTy = |
| 64 | DenseMap<const StringEntry *, DwarfStringPoolEntryWithExtString *>; |
| 65 | DwarfStringPoolEntriesTy DwarfStringPoolEntries; |
| 66 | |
| 67 | LinkingGlobalData &GlobalData; |
| 68 | }; |
| 69 | |
| 70 | } // end of namespace parallel |
| 71 | } // end of namespace dwarf_linker |
| 72 | } // end of namespace llvm |
| 73 | |
| 74 | #endif // LLVM_LIB_DWARFLINKER_PARALLEL_STRINGENTRYTODWARFSTRINGPOOLENTRYMAP_H |
| 75 |