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
encodeVersion(const llvm::VersionTuple & version)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
empty()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
archConfiguration237 llvm::MachO::Architecture arch() const { return platformInfo.target.Arch; }
238
platformConfiguration239 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
250