Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 1 | //===--- CacheTokens.cpp - Caching of lexer tokens for PCH support --------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This provides a possible implementation of PCH support for Clang that is |
| 11 | // based on caching lexed tokens and identifiers. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #include "clang.h" |
| 16 | #include "clang/Basic/FileManager.h" |
| 17 | #include "clang/Basic/SourceManager.h" |
| 18 | #include "clang/Basic/IdentifierTable.h" |
| 19 | #include "clang/Basic/Diagnostic.h" |
| 20 | #include "clang/Lex/Lexer.h" |
| 21 | #include "clang/Lex/Preprocessor.h" |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 22 | #include "llvm/ADT/StringMap.h" |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 23 | #include "llvm/Support/MemoryBuffer.h" |
| 24 | #include "llvm/Support/raw_ostream.h" |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 25 | #include "llvm/System/Path.h" |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 26 | #include "llvm/Support/Compiler.h" |
Ted Kremenek | 72b1b15 | 2009-01-15 18:47:46 +0000 | [diff] [blame] | 27 | #include "llvm/Support/Streams.h" |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 28 | |
| 29 | using namespace clang; |
| 30 | |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 31 | typedef uint32_t Offset; |
| 32 | |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 33 | static void Emit8(llvm::raw_ostream& Out, uint32_t V) { |
| 34 | Out << (unsigned char)(V); |
| 35 | } |
| 36 | |
| 37 | static void Emit16(llvm::raw_ostream& Out, uint32_t V) { |
| 38 | Out << (unsigned char)(V); |
| 39 | Out << (unsigned char)(V >> 8); |
| 40 | assert((V >> 16) == 0); |
| 41 | } |
| 42 | |
| 43 | static void Emit32(llvm::raw_ostream& Out, uint32_t V) { |
| 44 | Out << (unsigned char)(V); |
| 45 | Out << (unsigned char)(V >> 8); |
| 46 | Out << (unsigned char)(V >> 16); |
| 47 | Out << (unsigned char)(V >> 24); |
| 48 | } |
| 49 | |
Ted Kremenek | 337edcd | 2009-02-12 03:26:59 +0000 | [diff] [blame^] | 50 | static void Emit64(llvm::raw_ostream& Out, uint64_t V) { |
| 51 | Out << (unsigned char)(V); |
| 52 | Out << (unsigned char)(V >> 8); |
| 53 | Out << (unsigned char)(V >> 16); |
| 54 | Out << (unsigned char)(V >> 24); |
| 55 | Out << (unsigned char)(V >> 32); |
| 56 | Out << (unsigned char)(V >> 40); |
| 57 | Out << (unsigned char)(V >> 48); |
| 58 | Out << (unsigned char)(V >> 56); |
| 59 | } |
| 60 | |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 61 | static void Pad(llvm::raw_fd_ostream& Out, unsigned A) { |
| 62 | Offset off = (Offset) Out.tell(); |
| 63 | uint32_t n = ((uintptr_t)(off+A-1) & ~(uintptr_t)(A-1)) - off; |
| 64 | for ( ; n ; --n ) Emit8(Out, 0); |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 65 | } |
| 66 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 67 | // Bernstein hash function: |
| 68 | // This is basically copy-and-paste from StringMap. This likely won't |
| 69 | // stay here, which is why I didn't both to expose this function from |
| 70 | // String Map. |
| 71 | static unsigned BernsteinHash(const char* x) { |
| 72 | unsigned int R = 0; |
| 73 | for ( ; *x != '\0' ; ++x) R = R * 33 + *x; |
| 74 | return R + (R >> 5); |
| 75 | } |
| 76 | |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 77 | //===----------------------------------------------------------------------===// |
| 78 | // On Disk Hashtable Logic. This will eventually get refactored and put |
| 79 | // elsewhere. |
| 80 | //===----------------------------------------------------------------------===// |
| 81 | |
| 82 | template<typename Info> |
| 83 | class OnDiskChainedHashTableGenerator { |
| 84 | unsigned NumBuckets; |
| 85 | unsigned NumEntries; |
| 86 | llvm::BumpPtrAllocator BA; |
| 87 | |
| 88 | class Item { |
| 89 | public: |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 90 | typename Info::key_type key; |
| 91 | typename Info::data_type data; |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 92 | Item *next; |
| 93 | const uint32_t hash; |
| 94 | |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 95 | Item(typename Info::key_type_ref k, typename Info::data_type_ref d) |
| 96 | : key(k), data(d), next(0), hash(Info::ComputeHash(k)) {} |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 97 | }; |
| 98 | |
| 99 | class Bucket { |
| 100 | public: |
| 101 | Offset off; |
| 102 | Item* head; |
| 103 | unsigned length; |
| 104 | |
| 105 | Bucket() {} |
| 106 | }; |
| 107 | |
| 108 | Bucket* Buckets; |
| 109 | |
| 110 | private: |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 111 | void insert(Bucket* b, size_t size, Item* E) { |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 112 | unsigned idx = E->hash & (size - 1); |
| 113 | Bucket& B = b[idx]; |
| 114 | E->next = B.head; |
| 115 | ++B.length; |
| 116 | B.head = E; |
| 117 | } |
| 118 | |
| 119 | void resize(size_t newsize) { |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 120 | Bucket* newBuckets = (Bucket*) calloc(newsize, sizeof(Bucket)); |
| 121 | // Populate newBuckets with the old entries. |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 122 | for (unsigned i = 0; i < NumBuckets; ++i) |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 123 | for (Item* E = Buckets[i].head; E ; ) { |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 124 | Item* N = E->next; |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 125 | E->next = 0; |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 126 | insert(newBuckets, newsize, E); |
| 127 | E = N; |
| 128 | } |
| 129 | |
| 130 | free(Buckets); |
| 131 | NumBuckets = newsize; |
| 132 | Buckets = newBuckets; |
| 133 | } |
| 134 | |
| 135 | public: |
| 136 | |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 137 | void insert(typename Info::key_type_ref key, |
| 138 | typename Info::data_type_ref data) { |
| 139 | |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 140 | ++NumEntries; |
| 141 | if (4*NumEntries >= 3*NumBuckets) resize(NumBuckets*2); |
| 142 | insert(Buckets, NumBuckets, new (BA.Allocate<Item>()) Item(key, data)); |
| 143 | } |
| 144 | |
| 145 | Offset Emit(llvm::raw_fd_ostream& out) { |
| 146 | // Emit the payload of the table. |
| 147 | for (unsigned i = 0; i < NumBuckets; ++i) { |
| 148 | Bucket& B = Buckets[i]; |
| 149 | if (!B.head) continue; |
| 150 | |
| 151 | // Store the offset for the data of this bucket. |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 152 | B.off = out.tell(); |
| 153 | |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 154 | // Write out the number of items in the bucket. |
| 155 | Emit16(out, B.length); |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 156 | |
| 157 | // Write out the entries in the bucket. |
| 158 | for (Item *I = B.head; I ; I = I->next) { |
| 159 | Emit32(out, I->hash); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 160 | const std::pair<unsigned, unsigned>& Len = |
| 161 | Info::EmitKeyDataLength(out, I->key, I->data); |
| 162 | Info::EmitKey(out, I->key, Len.first); |
Ted Kremenek | 337edcd | 2009-02-12 03:26:59 +0000 | [diff] [blame^] | 163 | Info::EmitData(out, I->key, I->data, Len.second); |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 164 | } |
| 165 | } |
| 166 | |
| 167 | // Emit the hashtable itself. |
| 168 | Pad(out, 4); |
| 169 | Offset TableOff = out.tell(); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 170 | Emit32(out, NumBuckets); |
| 171 | Emit32(out, NumEntries); |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 172 | for (unsigned i = 0; i < NumBuckets; ++i) Emit32(out, Buckets[i].off); |
| 173 | |
| 174 | return TableOff; |
| 175 | } |
| 176 | |
| 177 | OnDiskChainedHashTableGenerator() { |
| 178 | NumEntries = 0; |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 179 | NumBuckets = 64; |
| 180 | // Note that we do not need to run the constructors of the individual |
| 181 | // Bucket objects since 'calloc' returns bytes that are all 0. |
| 182 | Buckets = (Bucket*) calloc(NumBuckets, sizeof(Bucket)); |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | ~OnDiskChainedHashTableGenerator() { |
| 186 | free(Buckets); |
| 187 | } |
| 188 | }; |
| 189 | |
| 190 | //===----------------------------------------------------------------------===// |
| 191 | // PTH-specific stuff. |
| 192 | //===----------------------------------------------------------------------===// |
| 193 | |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 194 | namespace { |
| 195 | class VISIBILITY_HIDDEN PCHEntry { |
| 196 | Offset TokenData, PPCondData; |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 197 | |
| 198 | public: |
| 199 | PCHEntry() {} |
| 200 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 201 | PCHEntry(Offset td, Offset ppcd) |
| 202 | : TokenData(td), PPCondData(ppcd) {} |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 203 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 204 | Offset getTokenOffset() const { return TokenData; } |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 205 | Offset getPPCondTableOffset() const { return PPCondData; } |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 206 | }; |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 207 | |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 208 | class VISIBILITY_HIDDEN FileEntryPCHEntryInfo { |
| 209 | public: |
| 210 | typedef const FileEntry* key_type; |
| 211 | typedef key_type key_type_ref; |
| 212 | |
| 213 | typedef PCHEntry data_type; |
| 214 | typedef const PCHEntry& data_type_ref; |
| 215 | |
| 216 | static unsigned ComputeHash(const FileEntry* FE) { |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 217 | return BernsteinHash(FE->getName()); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static std::pair<unsigned,unsigned> |
| 221 | EmitKeyDataLength(llvm::raw_ostream& Out, const FileEntry* FE, |
| 222 | const PCHEntry& E) { |
| 223 | |
| 224 | unsigned n = strlen(FE->getName()) + 1; |
| 225 | ::Emit16(Out, n); |
Ted Kremenek | 337edcd | 2009-02-12 03:26:59 +0000 | [diff] [blame^] | 226 | return std::make_pair(n,(4*2)+(4+4+2+8+8)); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | static void EmitKey(llvm::raw_ostream& Out, const FileEntry* FE, unsigned n) { |
| 230 | Out.write(FE->getName(), n); |
| 231 | } |
| 232 | |
Ted Kremenek | 337edcd | 2009-02-12 03:26:59 +0000 | [diff] [blame^] | 233 | static void EmitData(llvm::raw_ostream& Out, const FileEntry* FE, |
| 234 | const PCHEntry& E, unsigned) { |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 235 | ::Emit32(Out, E.getTokenOffset()); |
| 236 | ::Emit32(Out, E.getPPCondTableOffset()); |
Ted Kremenek | 337edcd | 2009-02-12 03:26:59 +0000 | [diff] [blame^] | 237 | // Emit stat information. |
| 238 | ::Emit32(Out, FE->getInode()); |
| 239 | ::Emit32(Out, FE->getDevice()); |
| 240 | ::Emit16(Out, FE->getFileMode()); |
| 241 | ::Emit64(Out, FE->getModificationTime()); |
| 242 | ::Emit64(Out, FE->getSize()); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 243 | } |
| 244 | }; |
| 245 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 246 | class OffsetOpt { |
| 247 | bool valid; |
| 248 | Offset off; |
| 249 | public: |
| 250 | OffsetOpt() : valid(false) {} |
| 251 | bool hasOffset() const { return valid; } |
| 252 | Offset getOffset() const { assert(valid); return off; } |
| 253 | void setOffset(Offset o) { off = o; valid = true; } |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 254 | }; |
| 255 | } // end anonymous namespace |
| 256 | |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 257 | typedef OnDiskChainedHashTableGenerator<FileEntryPCHEntryInfo> PCHMap; |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 258 | typedef llvm::DenseMap<const IdentifierInfo*,uint32_t> IDMap; |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 259 | typedef llvm::StringMap<OffsetOpt, llvm::BumpPtrAllocator> CachedStrsTy; |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 260 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 261 | namespace { |
| 262 | class VISIBILITY_HIDDEN PTHWriter { |
| 263 | IDMap IM; |
| 264 | llvm::raw_fd_ostream& Out; |
| 265 | Preprocessor& PP; |
| 266 | uint32_t idcount; |
| 267 | PCHMap PM; |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 268 | CachedStrsTy CachedStrs; |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 269 | Offset CurStrOffset; |
| 270 | std::vector<llvm::StringMapEntry<OffsetOpt>*> StrEntries; |
Ted Kremenek | 8f174e1 | 2008-12-23 02:52:12 +0000 | [diff] [blame] | 271 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 272 | //// Get the persistent id for the given IdentifierInfo*. |
| 273 | uint32_t ResolveID(const IdentifierInfo* II); |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 274 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 275 | /// Emit a token to the PTH file. |
| 276 | void EmitToken(const Token& T); |
| 277 | |
| 278 | void Emit8(uint32_t V) { |
| 279 | Out << (unsigned char)(V); |
| 280 | } |
| 281 | |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 282 | void Emit16(uint32_t V) { ::Emit16(Out, V); } |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 283 | |
| 284 | void Emit24(uint32_t V) { |
| 285 | Out << (unsigned char)(V); |
| 286 | Out << (unsigned char)(V >> 8); |
| 287 | Out << (unsigned char)(V >> 16); |
| 288 | assert((V >> 24) == 0); |
| 289 | } |
| 290 | |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 291 | void Emit32(uint32_t V) { ::Emit32(Out, V); } |
| 292 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 293 | void EmitBuf(const char* I, const char* E) { |
| 294 | for ( ; I != E ; ++I) Out << *I; |
| 295 | } |
| 296 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 297 | /// EmitIdentifierTable - Emits two tables to the PTH file. The first is |
| 298 | /// a hashtable mapping from identifier strings to persistent IDs. |
| 299 | /// The second is a straight table mapping from persistent IDs to string data |
| 300 | /// (the keys of the first table). |
Ted Kremenek | f1de464 | 2009-02-11 16:06:55 +0000 | [diff] [blame] | 301 | std::pair<Offset, Offset> EmitIdentifierTable(); |
| 302 | |
| 303 | /// EmitFileTable - Emit a table mapping from file name strings to PTH |
| 304 | /// token data. |
| 305 | Offset EmitFileTable() { return PM.Emit(Out); } |
| 306 | |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 307 | PCHEntry LexTokens(Lexer& L); |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 308 | Offset EmitCachedSpellings(); |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 309 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 310 | public: |
| 311 | PTHWriter(llvm::raw_fd_ostream& out, Preprocessor& pp) |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 312 | : Out(out), PP(pp), idcount(0), CurStrOffset(0) {} |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 313 | |
| 314 | void GeneratePTH(); |
| 315 | }; |
| 316 | } // end anonymous namespace |
| 317 | |
| 318 | uint32_t PTHWriter::ResolveID(const IdentifierInfo* II) { |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 319 | // Null IdentifierInfo's map to the persistent ID 0. |
| 320 | if (!II) |
| 321 | return 0; |
| 322 | |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 323 | IDMap::iterator I = IM.find(II); |
| 324 | |
| 325 | if (I == IM.end()) { |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 326 | IM[II] = ++idcount; // Pre-increment since '0' is reserved for NULL. |
| 327 | return idcount; |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 328 | } |
| 329 | |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 330 | return I->second; // We've already added 1. |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 331 | } |
| 332 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 333 | void PTHWriter::EmitToken(const Token& T) { |
Ted Kremenek | 7b78b7c | 2009-01-19 23:13:15 +0000 | [diff] [blame] | 334 | Emit32(((uint32_t) T.getKind()) | |
| 335 | (((uint32_t) T.getFlags()) << 8) | |
| 336 | (((uint32_t) T.getLength()) << 16)); |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 337 | |
Chris Lattner | 47246be | 2009-01-26 19:29:26 +0000 | [diff] [blame] | 338 | // Literals (strings, numbers, characters) get cached spellings. |
| 339 | if (T.isLiteral()) { |
| 340 | // FIXME: This uses the slow getSpelling(). Perhaps we do better |
| 341 | // in the future? This only slows down PTH generation. |
| 342 | const std::string &spelling = PP.getSpelling(T); |
| 343 | const char* s = spelling.c_str(); |
| 344 | |
| 345 | // Get the string entry. |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 346 | llvm::StringMapEntry<OffsetOpt> *E = |
| 347 | &CachedStrs.GetOrCreateValue(s, s+spelling.size()); |
| 348 | |
| 349 | if (!E->getValue().hasOffset()) { |
| 350 | E->getValue().setOffset(CurStrOffset); |
| 351 | StrEntries.push_back(E); |
| 352 | CurStrOffset += spelling.size() + 1; |
| 353 | } |
| 354 | |
| 355 | Emit32(E->getValue().getOffset()); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 356 | } |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 357 | else |
| 358 | Emit32(ResolveID(T.getIdentifierInfo())); |
| 359 | |
Chris Lattner | 52c2908 | 2009-01-27 06:27:13 +0000 | [diff] [blame] | 360 | Emit32(PP.getSourceManager().getFileOffset(T.getLocation())); |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 361 | } |
| 362 | |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 363 | PCHEntry PTHWriter::LexTokens(Lexer& L) { |
Ted Kremenek | 7b78b7c | 2009-01-19 23:13:15 +0000 | [diff] [blame] | 364 | // Pad 0's so that we emit tokens to a 4-byte alignment. |
| 365 | // This speed up reading them back in. |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 366 | Pad(Out, 4); |
| 367 | Offset off = (Offset) Out.tell(); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 368 | |
| 369 | // Keep track of matching '#if' ... '#endif'. |
| 370 | typedef std::vector<std::pair<Offset, unsigned> > PPCondTable; |
| 371 | PPCondTable PPCond; |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 372 | std::vector<unsigned> PPStartCond; |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 373 | bool ParsingPreprocessorDirective = false; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 374 | Token Tok; |
| 375 | |
| 376 | do { |
| 377 | L.LexFromRawLexer(Tok); |
Ted Kremenek | 726080d | 2009-02-10 22:43:16 +0000 | [diff] [blame] | 378 | NextToken: |
| 379 | |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 380 | if ((Tok.isAtStartOfLine() || Tok.is(tok::eof)) && |
| 381 | ParsingPreprocessorDirective) { |
| 382 | // Insert an eom token into the token cache. It has the same |
| 383 | // position as the next token that is not on the same line as the |
| 384 | // preprocessor directive. Observe that we continue processing |
| 385 | // 'Tok' when we exit this branch. |
| 386 | Token Tmp = Tok; |
| 387 | Tmp.setKind(tok::eom); |
| 388 | Tmp.clearFlag(Token::StartOfLine); |
| 389 | Tmp.setIdentifierInfo(0); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 390 | EmitToken(Tmp); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 391 | ParsingPreprocessorDirective = false; |
| 392 | } |
| 393 | |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 394 | if (Tok.is(tok::identifier)) { |
| 395 | Tok.setIdentifierInfo(PP.LookUpIdentifierInfo(Tok)); |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 396 | EmitToken(Tok); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 397 | continue; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 398 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 399 | |
| 400 | if (Tok.is(tok::hash) && Tok.isAtStartOfLine()) { |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 401 | // Special processing for #include. Store the '#' token and lex |
| 402 | // the next token. |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 403 | assert(!ParsingPreprocessorDirective); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 404 | Offset HashOff = (Offset) Out.tell(); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 405 | EmitToken(Tok); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 406 | |
| 407 | // Get the next token. |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 408 | L.LexFromRawLexer(Tok); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 409 | |
| 410 | assert(!Tok.isAtStartOfLine()); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 411 | |
| 412 | // Did we see 'include'/'import'/'include_next'? |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 413 | if (!Tok.is(tok::identifier)) { |
| 414 | EmitToken(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 415 | continue; |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 416 | } |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 417 | |
| 418 | IdentifierInfo* II = PP.LookUpIdentifierInfo(Tok); |
| 419 | Tok.setIdentifierInfo(II); |
| 420 | tok::PPKeywordKind K = II->getPPKeywordID(); |
| 421 | |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 422 | assert(K != tok::pp_not_keyword); |
| 423 | ParsingPreprocessorDirective = true; |
| 424 | |
| 425 | switch (K) { |
| 426 | default: |
| 427 | break; |
| 428 | case tok::pp_include: |
| 429 | case tok::pp_import: |
| 430 | case tok::pp_include_next: { |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 431 | // Save the 'include' token. |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 432 | EmitToken(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 433 | // Lex the next token as an include string. |
| 434 | L.setParsingPreprocessorDirective(true); |
| 435 | L.LexIncludeFilename(Tok); |
| 436 | L.setParsingPreprocessorDirective(false); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 437 | assert(!Tok.isAtStartOfLine()); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 438 | if (Tok.is(tok::identifier)) |
| 439 | Tok.setIdentifierInfo(PP.LookUpIdentifierInfo(Tok)); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 440 | |
| 441 | break; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 442 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 443 | case tok::pp_if: |
| 444 | case tok::pp_ifdef: |
| 445 | case tok::pp_ifndef: { |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 446 | // Add an entry for '#if' and friends. We initially set the target |
| 447 | // index to 0. This will get backpatched when we hit #endif. |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 448 | PPStartCond.push_back(PPCond.size()); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 449 | PPCond.push_back(std::make_pair(HashOff, 0U)); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 450 | break; |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 451 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 452 | case tok::pp_endif: { |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 453 | // Add an entry for '#endif'. We set the target table index to itself. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 454 | // This will later be set to zero when emitting to the PTH file. We |
| 455 | // use 0 for uninitialized indices because that is easier to debug. |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 456 | unsigned index = PPCond.size(); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 457 | // Backpatch the opening '#if' entry. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 458 | assert(!PPStartCond.empty()); |
| 459 | assert(PPCond.size() > PPStartCond.back()); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 460 | assert(PPCond[PPStartCond.back()].second == 0); |
| 461 | PPCond[PPStartCond.back()].second = index; |
| 462 | PPStartCond.pop_back(); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 463 | // Add the new entry to PPCond. |
| 464 | PPCond.push_back(std::make_pair(HashOff, index)); |
Ted Kremenek | 726080d | 2009-02-10 22:43:16 +0000 | [diff] [blame] | 465 | EmitToken(Tok); |
| 466 | |
| 467 | // Some files have gibberish on the same line as '#endif'. |
| 468 | // Discard these tokens. |
| 469 | do L.LexFromRawLexer(Tok); while (!Tok.is(tok::eof) && |
| 470 | !Tok.isAtStartOfLine()); |
| 471 | // We have the next token in hand. |
| 472 | // Don't immediately lex the next one. |
| 473 | goto NextToken; |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 474 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 475 | case tok::pp_elif: |
| 476 | case tok::pp_else: { |
| 477 | // Add an entry for #elif or #else. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 478 | // This serves as both a closing and opening of a conditional block. |
| 479 | // This means that its entry will get backpatched later. |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 480 | unsigned index = PPCond.size(); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 481 | // Backpatch the previous '#if' entry. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 482 | assert(!PPStartCond.empty()); |
| 483 | assert(PPCond.size() > PPStartCond.back()); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 484 | assert(PPCond[PPStartCond.back()].second == 0); |
| 485 | PPCond[PPStartCond.back()].second = index; |
| 486 | PPStartCond.pop_back(); |
| 487 | // Now add '#elif' as a new block opening. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 488 | PPCond.push_back(std::make_pair(HashOff, 0U)); |
| 489 | PPStartCond.push_back(index); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 490 | break; |
| 491 | } |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 492 | } |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | EmitToken(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 496 | } |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 497 | while (Tok.isNot(tok::eof)); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 498 | |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 499 | assert(PPStartCond.empty() && "Error: imblanced preprocessor conditionals."); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 500 | |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 501 | // Next write out PPCond. |
| 502 | Offset PPCondOff = (Offset) Out.tell(); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 503 | |
| 504 | // Write out the size of PPCond so that clients can identifer empty tables. |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 505 | Emit32(PPCond.size()); |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 506 | |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 507 | for (unsigned i = 0, e = PPCond.size(); i!=e; ++i) { |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 508 | Emit32(PPCond[i].first - off); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 509 | uint32_t x = PPCond[i].second; |
| 510 | assert(x != 0 && "PPCond entry not backpatched."); |
| 511 | // Emit zero for #endifs. This allows us to do checking when |
| 512 | // we read the PTH file back in. |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 513 | Emit32(x == i ? 0 : x); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 514 | } |
| 515 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 516 | return PCHEntry(off, PPCondOff); |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 517 | } |
| 518 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 519 | Offset PTHWriter::EmitCachedSpellings() { |
| 520 | // Write each cached strings to the PTH file. |
| 521 | Offset SpellingsOff = Out.tell(); |
| 522 | |
| 523 | for (std::vector<llvm::StringMapEntry<OffsetOpt>*>::iterator |
| 524 | I = StrEntries.begin(), E = StrEntries.end(); I!=E; ++I) { |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 525 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 526 | const char* data = (*I)->getKeyData(); |
| 527 | EmitBuf(data, data + (*I)->getKeyLength()); |
| 528 | Emit8('\0'); |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 529 | } |
| 530 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 531 | return SpellingsOff; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 532 | } |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 533 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 534 | void PTHWriter::GeneratePTH() { |
Ted Kremenek | e1b6498 | 2009-01-26 21:43:14 +0000 | [diff] [blame] | 535 | // Generate the prologue. |
| 536 | Out << "cfe-pth"; |
Ted Kremenek | 67d1505 | 2009-01-26 21:50:21 +0000 | [diff] [blame] | 537 | Emit32(PTHManager::Version); |
Ted Kremenek | a4bd8eb | 2009-02-11 23:34:32 +0000 | [diff] [blame] | 538 | |
| 539 | // Leave 4 words for the prologue. |
| 540 | Offset PrologueOffset = Out.tell(); |
| 541 | for (unsigned i = 0; i < 4 * sizeof(uint32_t); ++i) Emit8(0); |
Ted Kremenek | e1b6498 | 2009-01-26 21:43:14 +0000 | [diff] [blame] | 542 | |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 543 | // Iterate over all the files in SourceManager. Create a lexer |
| 544 | // for each file and cache the tokens. |
Chris Lattner | c6fe32a | 2009-01-17 03:48:08 +0000 | [diff] [blame] | 545 | SourceManager &SM = PP.getSourceManager(); |
| 546 | const LangOptions &LOpts = PP.getLangOptions(); |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 547 | |
Chris Lattner | c6fe32a | 2009-01-17 03:48:08 +0000 | [diff] [blame] | 548 | for (SourceManager::fileinfo_iterator I = SM.fileinfo_begin(), |
| 549 | E = SM.fileinfo_end(); I != E; ++I) { |
Chris Lattner | 0d0bf8c | 2009-02-03 07:30:45 +0000 | [diff] [blame] | 550 | const SrcMgr::ContentCache &C = *I->second; |
Chris Lattner | c6fe32a | 2009-01-17 03:48:08 +0000 | [diff] [blame] | 551 | const FileEntry *FE = C.Entry; |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 552 | |
| 553 | // FIXME: Handle files with non-absolute paths. |
| 554 | llvm::sys::Path P(FE->getName()); |
| 555 | if (!P.isAbsolute()) |
| 556 | continue; |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 557 | |
Chris Lattner | c6fe32a | 2009-01-17 03:48:08 +0000 | [diff] [blame] | 558 | const llvm::MemoryBuffer *B = C.getBuffer(); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 559 | if (!B) continue; |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 560 | |
Chris Lattner | 2b2453a | 2009-01-17 06:22:33 +0000 | [diff] [blame] | 561 | FileID FID = SM.createFileID(FE, SourceLocation(), SrcMgr::C_User); |
Chris Lattner | 025c3a6 | 2009-01-17 07:35:14 +0000 | [diff] [blame] | 562 | Lexer L(FID, SM, LOpts); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 563 | PM.insert(FE, LexTokens(L)); |
Daniel Dunbar | 31309ab | 2008-11-26 02:18:33 +0000 | [diff] [blame] | 564 | } |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 565 | |
| 566 | // Write out the identifier table. |
Ted Kremenek | f1de464 | 2009-02-11 16:06:55 +0000 | [diff] [blame] | 567 | const std::pair<Offset,Offset>& IdTableOff = EmitIdentifierTable(); |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 568 | |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 569 | // Write out the cached strings table. |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 570 | Offset SpellingOff = EmitCachedSpellings(); |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 571 | |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 572 | // Write out the file table. |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 573 | Offset FileTableOff = EmitFileTable(); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 574 | |
Ted Kremenek | a4bd8eb | 2009-02-11 23:34:32 +0000 | [diff] [blame] | 575 | // Finally, write the prologue. |
| 576 | Out.seek(PrologueOffset); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 577 | Emit32(IdTableOff.first); |
Ted Kremenek | f1de464 | 2009-02-11 16:06:55 +0000 | [diff] [blame] | 578 | Emit32(IdTableOff.second); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 579 | Emit32(FileTableOff); |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 580 | Emit32(SpellingOff); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 581 | } |
| 582 | |
| 583 | void clang::CacheTokens(Preprocessor& PP, const std::string& OutFile) { |
| 584 | // Lex through the entire file. This will populate SourceManager with |
| 585 | // all of the header information. |
| 586 | Token Tok; |
| 587 | PP.EnterMainSourceFile(); |
| 588 | do { PP.Lex(Tok); } while (Tok.isNot(tok::eof)); |
| 589 | |
| 590 | // Open up the PTH file. |
| 591 | std::string ErrMsg; |
| 592 | llvm::raw_fd_ostream Out(OutFile.c_str(), true, ErrMsg); |
| 593 | |
| 594 | if (!ErrMsg.empty()) { |
| 595 | llvm::errs() << "PTH error: " << ErrMsg << "\n"; |
| 596 | return; |
| 597 | } |
| 598 | |
| 599 | // Create the PTHWriter and generate the PTH file. |
| 600 | PTHWriter PW(Out, PP); |
| 601 | PW.GeneratePTH(); |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 602 | } |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 603 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 604 | //===----------------------------------------------------------------------===// |
| 605 | |
| 606 | namespace { |
| 607 | class VISIBILITY_HIDDEN PCHIdKey { |
| 608 | public: |
| 609 | const IdentifierInfo* II; |
| 610 | uint32_t FileOffset; |
| 611 | }; |
| 612 | |
| 613 | class VISIBILITY_HIDDEN PCHIdentifierTableTrait { |
| 614 | public: |
| 615 | typedef PCHIdKey* key_type; |
| 616 | typedef key_type key_type_ref; |
| 617 | |
| 618 | typedef uint32_t data_type; |
| 619 | typedef data_type data_type_ref; |
| 620 | |
| 621 | static unsigned ComputeHash(PCHIdKey* key) { |
| 622 | return BernsteinHash(key->II->getName()); |
| 623 | } |
| 624 | |
| 625 | static std::pair<unsigned,unsigned> |
| 626 | EmitKeyDataLength(llvm::raw_ostream& Out, const PCHIdKey* key, uint32_t) { |
| 627 | unsigned n = strlen(key->II->getName()) + 1; |
| 628 | ::Emit16(Out, n); |
| 629 | return std::make_pair(n, sizeof(uint32_t)); |
| 630 | } |
| 631 | |
| 632 | static void EmitKey(llvm::raw_fd_ostream& Out, PCHIdKey* key, unsigned n) { |
| 633 | // Record the location of the key data. This is used when generating |
| 634 | // the mapping from persistent IDs to strings. |
| 635 | key->FileOffset = Out.tell(); |
| 636 | Out.write(key->II->getName(), n); |
| 637 | } |
| 638 | |
Ted Kremenek | 337edcd | 2009-02-12 03:26:59 +0000 | [diff] [blame^] | 639 | static void EmitData(llvm::raw_ostream& Out, PCHIdKey*, uint32_t pID, |
| 640 | unsigned) { |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 641 | ::Emit32(Out, pID); |
| 642 | } |
| 643 | }; |
| 644 | } // end anonymous namespace |
| 645 | |
| 646 | /// EmitIdentifierTable - Emits two tables to the PTH file. The first is |
| 647 | /// a hashtable mapping from identifier strings to persistent IDs. The second |
| 648 | /// is a straight table mapping from persistent IDs to string data (the |
| 649 | /// keys of the first table). |
| 650 | /// |
| 651 | std::pair<Offset,Offset> PTHWriter::EmitIdentifierTable() { |
| 652 | // Build two maps: |
| 653 | // (1) an inverse map from persistent IDs -> (IdentifierInfo*,Offset) |
| 654 | // (2) a map from (IdentifierInfo*, Offset)* -> persistent IDs |
| 655 | |
| 656 | // Note that we use 'calloc', so all the bytes are 0. |
| 657 | PCHIdKey* IIDMap = (PCHIdKey*) calloc(idcount, sizeof(PCHIdKey)); |
| 658 | |
| 659 | // Create the hashtable. |
| 660 | OnDiskChainedHashTableGenerator<PCHIdentifierTableTrait> IIOffMap; |
| 661 | |
| 662 | // Generate mapping from persistent IDs -> IdentifierInfo*. |
| 663 | for (IDMap::iterator I=IM.begin(), E=IM.end(); I!=E; ++I) { |
| 664 | // Decrement by 1 because we are using a vector for the lookup and |
| 665 | // 0 is reserved for NULL. |
| 666 | assert(I->second > 0); |
| 667 | assert(I->second-1 < idcount); |
| 668 | unsigned idx = I->second-1; |
| 669 | |
| 670 | // Store the mapping from persistent ID to IdentifierInfo* |
| 671 | IIDMap[idx].II = I->first; |
| 672 | |
| 673 | // Store the reverse mapping in a hashtable. |
| 674 | IIOffMap.insert(&IIDMap[idx], I->second); |
| 675 | } |
| 676 | |
| 677 | // Write out the inverse map first. This causes the PCIDKey entries to |
| 678 | // record PTH file offsets for the string data. This is used to write |
| 679 | // the second table. |
| 680 | Offset StringTableOffset = IIOffMap.Emit(Out); |
| 681 | |
| 682 | // Now emit the table mapping from persistent IDs to PTH file offsets. |
| 683 | Offset IDOff = Out.tell(); |
| 684 | Emit32(idcount); // Emit the number of identifiers. |
| 685 | for (unsigned i = 0 ; i < idcount; ++i) Emit32(IIDMap[i].FileOffset); |
| 686 | |
| 687 | // Finally, release the inverse map. |
| 688 | free(IIDMap); |
| 689 | |
| 690 | return std::make_pair(IDOff, StringTableOffset); |
| 691 | } |
| 692 | |
| 693 | |