lld/MachO/Config.h

   1 //===- Config.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 LLD_MACHO_CONFIG_H
  10 #define LLD_MACHO_CONFIG_H
  11
  12 #include "llvm/ADT/CachedHashString.h"
  13 #include "llvm/ADT/DenseMap.h"
  14 #include "llvm/ADT/DenseSet.h"
  15 #include "llvm/ADT/MapVector.h"
  16 #include "llvm/ADT/SmallVector.h"
  17 #include "llvm/ADT/StringRef.h"
  18 #include "llvm/ADT/StringSet.h"
  19 #include "llvm/BinaryFormat/MachO.h"
  20 #include "llvm/Support/CachePruning.h"
  21 #include "llvm/Support/GlobPattern.h"
  22 #include "llvm/Support/VersionTuple.h"
  23 #include "llvm/TextAPI/Architecture.h"
  24 #include "llvm/TextAPI/Platform.h"
  25 #include "llvm/TextAPI/Target.h"
  26
  27 #include <vector>
  28
  29 namespace llvm {
  30 enum class CodeGenOptLevel;
  31 } // namespace llvm
  32
  33 namespace lld {
  34 namespace macho {
  35
  36 class InputSection;
  37 class Symbol;
  38
  39 using NamePair = std::pair<llvm::StringRef, llvm::StringRef>;
  40 using SectionRenameMap = llvm::DenseMap<NamePair, NamePair>;
  41 using SegmentRenameMap = llvm::DenseMap<llvm::StringRef, llvm::StringRef>;
  42
  43 struct PlatformInfo {
  44   llvm::MachO::Target target;
  45   llvm::VersionTuple sdk;
  46 };
  47
  48 inline uint32_t encodeVersion(const llvm::VersionTuple &version) {
  49   return ((version.getMajor() << 020) |
  50           (version.getMinor().value_or(0) << 010) |
  51           version.getSubminor().value_or(0));
  52 }
  53
  54 enum class NamespaceKind {
  55   twolevel,
  56   flat,
  57 };
  58
  59 enum class UndefinedSymbolTreatment {
  60   unknown,
  61   error,
  62   warning,
  63   suppress,
  64   dynamic_lookup,
  65 };
  66
  67 enum class ICFLevel {
  68   unknown,
  69   none,
  70   safe,
  71   all,
  72 };
  73
  74 enum class ObjCStubsMode {
  75   fast,
  76   small,
  77 };
  78
  79 struct SectionAlign {
  80   llvm::StringRef segName;
  81   llvm::StringRef sectName;
  82   uint32_t align;
  83 };
  84
  85 struct SegmentProtection {
  86   llvm::StringRef name;
  87   uint32_t maxProt;
  88   uint32_t initProt;
  89 };
  90
  91 class SymbolPatterns {
  92 public:
  93   // GlobPattern can also match literals,
  94   // but we prefer the O(1) lookup of DenseSet.
  95   llvm::DenseSet<llvm::CachedHashStringRef> literals;
  96   std::vector<llvm::GlobPattern> globs;
  97
  98   bool empty() const { return literals.empty() && globs.empty(); }
  99   void clear();
 100   void insert(llvm::StringRef symbolName);
 101   bool matchLiteral(llvm::StringRef symbolName) const;
 102   bool matchGlob(llvm::StringRef symbolName) const;
 103   bool match(llvm::StringRef symbolName) const;
 104 };
 105
 106 enum class SymtabPresence {
 107   All,
 108   None,
 109   SelectivelyIncluded,
 110   SelectivelyExcluded,
 111 };
 112
 113 struct Configuration {
 114   Symbol *entry = nullptr;
 115   bool hasReexports = false;
 116   bool allLoad = false;
 117   bool applicationExtension = false;
 118   bool archMultiple = false;
 119   bool exportDynamic = false;
 120   bool forceLoadObjC = false;
 121   bool forceLoadSwift = false; // Only applies to LC_LINKER_OPTIONs.
 122   bool staticLink = false;
 123   bool implicitDylibs = false;
 124   bool isPic = false;
 125   bool headerPadMaxInstallNames = false;
 126   bool markDeadStrippableDylib = false;
 127   bool printDylibSearch = false;
 128   bool printEachFile = false;
 129   bool printWhyLoad = false;
 130   bool searchDylibsFirst = false;
 131   bool saveTemps = false;
 132   bool adhocCodesign = false;
 133   bool emitFunctionStarts = false;
 134   bool emitDataInCodeInfo = false;
 135   bool emitEncryptionInfo = false;
 136   bool emitInitOffsets = false;
 137   bool emitChainedFixups = false;
 138   bool thinLTOEmitImportsFiles;
 139   bool thinLTOEmitIndexFiles;
 140   bool thinLTOIndexOnly;
 141   bool timeTraceEnabled = false;
 142   bool dataConst = false;
 143   bool dedupStrings = true;
 144   bool deadStripDuplicates = false;
 145   bool omitDebugInfo = false;
 146   bool warnDylibInstallName = false;
 147   bool ignoreOptimizationHints = false;
 148   bool forceExactCpuSubtypeMatch = false;
 149   uint32_t headerPad;
 150   uint32_t dylibCompatibilityVersion = 0;
 151   uint32_t dylibCurrentVersion = 0;
 152   uint32_t timeTraceGranularity = 500;
 153   unsigned optimize;
 154   std::string progName;
 155
 156   // For `clang -arch arm64 -arch x86_64`, clang will:
 157   // 1. invoke the linker twice, to write one temporary output per arch
 158   // 2. invoke `lipo` to merge the two outputs into a single file
 159   // `outputFile` is the name of the temporary file the linker writes to.
 160   // `finalOutput `is the name of the file lipo writes to after the link.
 161   llvm::StringRef outputFile;
 162   llvm::StringRef finalOutput;
 163
 164   llvm::StringRef installName;
 165   llvm::StringRef mapFile;
 166   llvm::StringRef ltoObjPath;
 167   llvm::StringRef thinLTOJobs;
 168   llvm::StringRef umbrella;
 169   uint32_t ltoo = 2;
 170   llvm::CodeGenOptLevel ltoCgo;
 171   llvm::CachePruningPolicy thinLTOCachePolicy;
 172   llvm::StringRef thinLTOCacheDir;
 173   llvm::StringRef thinLTOIndexOnlyArg;
 174   std::pair<llvm::StringRef, llvm::StringRef> thinLTOObjectSuffixReplace;
 175   llvm::StringRef thinLTOPrefixReplaceOld;
 176   llvm::StringRef thinLTOPrefixReplaceNew;
 177   llvm::StringRef thinLTOPrefixReplaceNativeObject;
 178   bool deadStripDylibs = false;
 179   bool demangle = false;
 180   bool deadStrip = false;
 181   bool errorForArchMismatch = false;
 182   bool ignoreAutoLink = false;
 183   // ld64 allows invalid auto link options as long as the link succeeds. LLD
 184   // does not, but there are cases in the wild where the invalid linker options
 185   // exist. This allows users to ignore the specific invalid options in the case
 186   // they can't easily fix them.
 187   llvm::StringSet<> ignoreAutoLinkOptions;
 188   bool strictAutoLink = false;
 189   PlatformInfo platformInfo;
 190   std::optional<PlatformInfo> secondaryPlatformInfo;
 191   NamespaceKind namespaceKind = NamespaceKind::twolevel;
 192   UndefinedSymbolTreatment undefinedSymbolTreatment =
 193       UndefinedSymbolTreatment::error;
 194   ICFLevel icfLevel = ICFLevel::none;
 195   ObjCStubsMode objcStubsMode = ObjCStubsMode::fast;
 196   llvm::MachO::HeaderFileType outputType;
 197   std::vector<llvm::StringRef> systemLibraryRoots;
 198   std::vector<llvm::StringRef> librarySearchPaths;
 199   std::vector<llvm::StringRef> frameworkSearchPaths;
 200   llvm::SmallVector<llvm::StringRef, 0> runtimePaths;
 201   std::vector<std::string> astPaths;
 202   std::vector<Symbol *> explicitUndefineds;
 203   llvm::StringSet<> explicitDynamicLookups;
 204   // There are typically few custom sectionAlignments or segmentProtections,
 205   // so use a vector instead of a map.
 206   std::vector<SectionAlign> sectionAlignments;
 207   std::vector<SegmentProtection> segmentProtections;
 208   bool ltoDebugPassManager = false;
 209   bool csProfileGenerate = false;
 210   llvm::StringRef csProfilePath;
 211   bool pgoWarnMismatch;
 212
 213   bool callGraphProfileSort = false;
 214   llvm::StringRef printSymbolOrder;
 215
 216   SectionRenameMap sectionRenameMap;
 217   SegmentRenameMap segmentRenameMap;
 218
 219   bool hasExplicitExports = false;
 220   SymbolPatterns exportedSymbols;
 221   SymbolPatterns unexportedSymbols;
 222   SymbolPatterns whyLive;
 223
 224   std::vector<std::pair<llvm::StringRef, llvm::StringRef>> aliasedSymbols;
 225
 226   SymtabPresence localSymbolsPresence = SymtabPresence::All;
 227   SymbolPatterns localSymbolPatterns;
 228   llvm::SmallVector<llvm::StringRef, 0> mllvmOpts;
 229
 230   bool zeroModTime = true;
 231   bool generateUuid = true;
 232
 233   llvm::StringRef osoPrefix;
 234
 235   std::vector<llvm::StringRef> dyldEnvs;
 236
 237   llvm::MachO::Architecture arch() const { return platformInfo.target.Arch; }
 238
 239   llvm::MachO::PlatformType platform() const {
 240     return platformInfo.target.Platform;
 241   }
 242 };
 243
 244 extern std::unique_ptr<Configuration> config;
 245
 246 } // namespace macho
 247 } // namespace lld
 248
 249 #endif