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/SetVector.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 safe_thunks,
72 all,
73 };
74
75 enum class ObjCStubsMode {
76 fast,
77 small,
78 };
79
80 struct SectionAlign {
81 llvm::StringRef segName;
82 llvm::StringRef sectName;
83 uint32_t align;
84 };
85
86 struct SegmentProtection {
87 llvm::StringRef name;
88 uint32_t maxProt;
89 uint32_t initProt;
90 };
91
92 class SymbolPatterns {
93 public:
94 // GlobPattern can also match literals,
95 // but we prefer the O(1) lookup of DenseSet.
96 llvm::SetVector<llvm::CachedHashStringRef> literals;
97 std::vector<llvm::GlobPattern> globs;
98
empty()99 bool empty() const { return literals.empty() && globs.empty(); }
100 void clear();
101 void insert(llvm::StringRef symbolName);
102 bool matchLiteral(llvm::StringRef symbolName) const;
103 bool matchGlob(llvm::StringRef symbolName) const;
104 bool match(llvm::StringRef symbolName) const;
105 };
106
107 enum class SymtabPresence {
108 All,
109 None,
110 SelectivelyIncluded,
111 SelectivelyExcluded,
112 };
113
114 struct Configuration {
115 Symbol *entry = nullptr;
116 bool hasReexports = false;
117 bool allLoad = false;
118 bool applicationExtension = false;
119 bool archMultiple = false;
120 bool exportDynamic = false;
121 bool forceLoadObjC = false;
122 bool forceLoadSwift = false; // Only applies to LC_LINKER_OPTIONs.
123 bool staticLink = false;
124 bool implicitDylibs = false;
125 bool isPic = false;
126 bool headerPadMaxInstallNames = false;
127 bool markDeadStrippableDylib = false;
128 bool printDylibSearch = false;
129 bool printEachFile = false;
130 bool printWhyLoad = false;
131 bool searchDylibsFirst = false;
132 bool saveTemps = false;
133 bool adhocCodesign = false;
134 bool emitFunctionStarts = false;
135 bool emitDataInCodeInfo = false;
136 bool emitEncryptionInfo = false;
137 bool emitInitOffsets = false;
138 bool emitChainedFixups = false;
139 bool emitRelativeMethodLists = false;
140 bool thinLTOEmitImportsFiles;
141 bool thinLTOEmitIndexFiles;
142 bool thinLTOIndexOnly;
143 bool timeTraceEnabled = false;
144 bool dataConst = false;
145 bool dedupStrings = true;
146 bool dedupSymbolStrings = true;
147 bool deadStripDuplicates = false;
148 bool omitDebugInfo = false;
149 bool warnDylibInstallName = false;
150 bool ignoreOptimizationHints = false;
151 bool forceExactCpuSubtypeMatch = false;
152 uint32_t headerPad;
153 uint32_t dylibCompatibilityVersion = 0;
154 uint32_t dylibCurrentVersion = 0;
155 uint32_t timeTraceGranularity = 500;
156 unsigned optimize;
157 std::string progName;
158
159 // For `clang -arch arm64 -arch x86_64`, clang will:
160 // 1. invoke the linker twice, to write one temporary output per arch
161 // 2. invoke `lipo` to merge the two outputs into a single file
162 // `outputFile` is the name of the temporary file the linker writes to.
163 // `finalOutput `is the name of the file lipo writes to after the link.
164 llvm::StringRef outputFile;
165 llvm::StringRef finalOutput;
166
167 llvm::StringRef installName;
168 llvm::StringRef clientName;
169 llvm::StringRef mapFile;
170 llvm::StringRef ltoNewPmPasses;
171 llvm::StringRef ltoObjPath;
172 llvm::StringRef thinLTOJobs;
173 llvm::StringRef umbrella;
174 uint32_t ltoo = 2;
175 llvm::CodeGenOptLevel ltoCgo;
176 llvm::CachePruningPolicy thinLTOCachePolicy;
177 llvm::StringRef thinLTOCacheDir;
178 llvm::StringRef thinLTOIndexOnlyArg;
179 std::pair<llvm::StringRef, llvm::StringRef> thinLTOObjectSuffixReplace;
180 llvm::StringRef thinLTOPrefixReplaceOld;
181 llvm::StringRef thinLTOPrefixReplaceNew;
182 llvm::StringRef thinLTOPrefixReplaceNativeObject;
183 bool deadStripDylibs = false;
184 bool demangle = false;
185 bool deadStrip = false;
186 bool interposable = false;
187 bool errorForArchMismatch = false;
188 bool ignoreAutoLink = false;
189 // ld64 allows invalid auto link options as long as the link succeeds. LLD
190 // does not, but there are cases in the wild where the invalid linker options
191 // exist. This allows users to ignore the specific invalid options in the case
192 // they can't easily fix them.
193 llvm::StringSet<> ignoreAutoLinkOptions;
194 bool strictAutoLink = false;
195 PlatformInfo platformInfo;
196 std::optional<PlatformInfo> secondaryPlatformInfo;
197 NamespaceKind namespaceKind = NamespaceKind::twolevel;
198 UndefinedSymbolTreatment undefinedSymbolTreatment =
199 UndefinedSymbolTreatment::error;
200 ICFLevel icfLevel = ICFLevel::none;
201 bool keepICFStabs = false;
202 ObjCStubsMode objcStubsMode = ObjCStubsMode::fast;
203 llvm::MachO::HeaderFileType outputType;
204 std::vector<llvm::StringRef> systemLibraryRoots;
205 std::vector<llvm::StringRef> librarySearchPaths;
206 std::vector<llvm::StringRef> frameworkSearchPaths;
207 bool warnDuplicateRpath = true;
208 llvm::SmallVector<llvm::StringRef, 0> runtimePaths;
209 llvm::SmallVector<llvm::StringRef, 0> allowableClients;
210 std::vector<std::string> astPaths;
211 std::vector<Symbol *> explicitUndefineds;
212 llvm::StringSet<> explicitDynamicLookups;
213 // There are typically few custom sectionAlignments or segmentProtections,
214 // so use a vector instead of a map.
215 std::vector<SectionAlign> sectionAlignments;
216 std::vector<SegmentProtection> segmentProtections;
217 bool ltoDebugPassManager = false;
218 llvm::StringRef codegenDataGeneratePath;
219 bool csProfileGenerate = false;
220 llvm::StringRef csProfilePath;
221 bool pgoWarnMismatch;
222 bool warnThinArchiveMissingMembers;
223 bool disableVerify;
224
225 bool callGraphProfileSort = false;
226 llvm::StringRef printSymbolOrder;
227
228 llvm::StringRef irpgoProfilePath;
229 bool bpStartupFunctionSort = false;
230 bool bpCompressionSortStartupFunctions = false;
231 bool bpFunctionOrderForCompression = false;
232 bool bpDataOrderForCompression = false;
233 bool bpVerboseSectionOrderer = false;
234
235 SectionRenameMap sectionRenameMap;
236 SegmentRenameMap segmentRenameMap;
237
238 bool hasExplicitExports = false;
239 SymbolPatterns exportedSymbols;
240 SymbolPatterns unexportedSymbols;
241 SymbolPatterns whyLive;
242
243 std::vector<std::pair<llvm::StringRef, llvm::StringRef>> aliasedSymbols;
244
245 SymtabPresence localSymbolsPresence = SymtabPresence::All;
246 SymbolPatterns localSymbolPatterns;
247 llvm::SmallVector<llvm::StringRef, 0> mllvmOpts;
248 llvm::SmallVector<llvm::StringRef, 0> passPlugins;
249
250 bool zeroModTime = true;
251 bool generateUuid = true;
252
253 llvm::StringRef osoPrefix;
254
255 std::vector<llvm::StringRef> dyldEnvs;
256
archConfiguration257 llvm::MachO::Architecture arch() const { return platformInfo.target.Arch; }
258
platformConfiguration259 llvm::MachO::PlatformType platform() const {
260 return platformInfo.target.Platform;
261 }
262 };
263
264 extern std::unique_ptr<Configuration> config;
265
266 } // namespace macho
267 } // namespace lld
268
269 #endif
270