Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 1 | //===--- CacheTokens.cpp - Caching of lexer tokens for PTH support --------===// |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 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 | // |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 10 | // This provides a possible implementation of PTH support for Clang that is |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 11 | // based on caching lexed tokens and identifiers. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
Eli Friedman | b09f6e1 | 2009-05-19 04:14:29 +0000 | [diff] [blame] | 15 | #include "clang/Frontend/Utils.h" |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 16 | #include "clang/Basic/Diagnostic.h" |
Chris Lattner | 10e286a | 2010-11-23 19:19:34 +0000 | [diff] [blame] | 17 | #include "clang/Basic/FileManager.h" |
| 18 | #include "clang/Basic/FileSystemStatCache.h" |
| 19 | #include "clang/Basic/IdentifierTable.h" |
Chris Lattner | 10e286a | 2010-11-23 19:19:34 +0000 | [diff] [blame] | 20 | #include "clang/Basic/SourceManager.h" |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 21 | #include "clang/Lex/Lexer.h" |
| 22 | #include "clang/Lex/Preprocessor.h" |
Daniel Dunbar | df5a237 | 2009-10-17 20:43:58 +0000 | [diff] [blame] | 23 | #include "llvm/ADT/StringExtras.h" |
| 24 | #include "llvm/ADT/StringMap.h" |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 25 | #include "llvm/Support/EndianStream.h" |
Michael J. Spencer | fbfd180 | 2010-12-21 16:45:57 +0000 | [diff] [blame] | 26 | #include "llvm/Support/FileSystem.h" |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 27 | #include "llvm/Support/MemoryBuffer.h" |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 28 | #include "llvm/Support/OnDiskHashTable.h" |
Michael J. Spencer | 03013fa | 2010-11-29 18:12:39 +0000 | [diff] [blame] | 29 | #include "llvm/Support/Path.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 30 | #include "llvm/Support/raw_ostream.h" |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 31 | |
Cedric Venet | ea684e6 | 2009-02-14 16:15:20 +0000 | [diff] [blame] | 32 | // FIXME: put this somewhere else? |
| 33 | #ifndef S_ISDIR |
| 34 | #define S_ISDIR(x) (((x)&_S_IFDIR)!=0) |
| 35 | #endif |
| 36 | |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 37 | using namespace clang; |
Ted Kremenek | f0e1f79 | 2009-02-10 01:14:45 +0000 | [diff] [blame] | 38 | |
| 39 | //===----------------------------------------------------------------------===// |
| 40 | // PTH-specific stuff. |
| 41 | //===----------------------------------------------------------------------===// |
| 42 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 43 | typedef uint32_t Offset; |
| 44 | |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 45 | namespace { |
Benjamin Kramer | bd21828 | 2009-11-28 10:07:24 +0000 | [diff] [blame] | 46 | class PTHEntry { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 47 | Offset TokenData, PPCondData; |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 48 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 49 | public: |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 50 | PTHEntry() {} |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 51 | |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 52 | PTHEntry(Offset td, Offset ppcd) |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 53 | : TokenData(td), PPCondData(ppcd) {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 54 | |
| 55 | Offset getTokenOffset() const { return TokenData; } |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 56 | Offset getPPCondTableOffset() const { return PPCondData; } |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 57 | }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 58 | |
| 59 | |
Benjamin Kramer | bd21828 | 2009-11-28 10:07:24 +0000 | [diff] [blame] | 60 | class PTHEntryKeyVariant { |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 61 | union { const FileEntry* FE; const char* Path; }; |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 62 | enum { IsFE = 0x1, IsDE = 0x2, IsNoExist = 0x0 } Kind; |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 63 | FileData *Data; |
| 64 | |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 65 | public: |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 66 | PTHEntryKeyVariant(const FileEntry *fe) : FE(fe), Kind(IsFE), Data(nullptr) {} |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 67 | |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 68 | PTHEntryKeyVariant(FileData *Data, const char *path) |
| 69 | : Path(path), Kind(IsDE), Data(new FileData(*Data)) {} |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 70 | |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 71 | explicit PTHEntryKeyVariant(const char *path) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 72 | : Path(path), Kind(IsNoExist), Data(nullptr) {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 73 | |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 74 | bool isFile() const { return Kind == IsFE; } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 75 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 76 | StringRef getString() const { |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 77 | return Kind == IsFE ? FE->getName() : Path; |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 78 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 79 | |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 80 | unsigned getKind() const { return (unsigned) Kind; } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 81 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 82 | void EmitData(raw_ostream& Out) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 83 | using namespace llvm::support; |
| 84 | endian::Writer<little> LE(Out); |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 85 | switch (Kind) { |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 86 | case IsFE: { |
Mike Stump | b716633 | 2010-01-20 02:03:14 +0000 | [diff] [blame] | 87 | // Emit stat information. |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 88 | llvm::sys::fs::UniqueID UID = FE->getUniqueID(); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 89 | LE.write<uint64_t>(UID.getFile()); |
| 90 | LE.write<uint64_t>(UID.getDevice()); |
| 91 | LE.write<uint64_t>(FE->getModificationTime()); |
| 92 | LE.write<uint64_t>(FE->getSize()); |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 93 | } break; |
Mike Stump | b716633 | 2010-01-20 02:03:14 +0000 | [diff] [blame] | 94 | case IsDE: |
| 95 | // Emit stat information. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 96 | LE.write<uint64_t>(Data->UniqueID.getFile()); |
| 97 | LE.write<uint64_t>(Data->UniqueID.getDevice()); |
| 98 | LE.write<uint64_t>(Data->ModTime); |
| 99 | LE.write<uint64_t>(Data->Size); |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 100 | delete Data; |
Mike Stump | b716633 | 2010-01-20 02:03:14 +0000 | [diff] [blame] | 101 | break; |
| 102 | default: |
| 103 | break; |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 104 | } |
| 105 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 106 | |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 107 | unsigned getRepresentationLength() const { |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 108 | return Kind == IsNoExist ? 0 : 4 + 4 + 2 + 8 + 8; |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 109 | } |
| 110 | }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 111 | |
Benjamin Kramer | bd21828 | 2009-11-28 10:07:24 +0000 | [diff] [blame] | 112 | class FileEntryPTHEntryInfo { |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 113 | public: |
| 114 | typedef PTHEntryKeyVariant key_type; |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 115 | typedef key_type key_type_ref; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 116 | |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 117 | typedef PTHEntry data_type; |
| 118 | typedef const PTHEntry& data_type_ref; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 119 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 120 | typedef unsigned hash_value_type; |
| 121 | typedef unsigned offset_type; |
| 122 | |
| 123 | static hash_value_type ComputeHash(PTHEntryKeyVariant V) { |
Daniel Dunbar | df5a237 | 2009-10-17 20:43:58 +0000 | [diff] [blame] | 124 | return llvm::HashString(V.getString()); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 125 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 126 | |
| 127 | static std::pair<unsigned,unsigned> |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 128 | EmitKeyDataLength(raw_ostream& Out, PTHEntryKeyVariant V, |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 129 | const PTHEntry& E) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 130 | using namespace llvm::support; |
| 131 | endian::Writer<little> LE(Out); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 132 | |
Daniel Dunbar | df5a237 | 2009-10-17 20:43:58 +0000 | [diff] [blame] | 133 | unsigned n = V.getString().size() + 1 + 1; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 134 | LE.write<uint16_t>(n); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 135 | |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 136 | unsigned m = V.getRepresentationLength() + (V.isFile() ? 4 + 4 : 0); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 137 | LE.write<uint8_t>(m); |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 138 | |
| 139 | return std::make_pair(n, m); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 140 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 141 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 142 | static void EmitKey(raw_ostream& Out, PTHEntryKeyVariant V, unsigned n){ |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 143 | using namespace llvm::support; |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 144 | // Emit the entry kind. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 145 | endian::Writer<little>(Out).write<uint8_t>((unsigned)V.getKind()); |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 146 | // Emit the string. |
Daniel Dunbar | df5a237 | 2009-10-17 20:43:58 +0000 | [diff] [blame] | 147 | Out.write(V.getString().data(), n - 1); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 148 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 149 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 150 | static void EmitData(raw_ostream& Out, PTHEntryKeyVariant V, |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 151 | const PTHEntry& E, unsigned) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 152 | using namespace llvm::support; |
| 153 | endian::Writer<little> LE(Out); |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 154 | |
| 155 | // For file entries emit the offsets into the PTH file for token data |
| 156 | // and the preprocessor blocks table. |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 157 | if (V.isFile()) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 158 | LE.write<uint32_t>(E.getTokenOffset()); |
| 159 | LE.write<uint32_t>(E.getPPCondTableOffset()); |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 160 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 161 | |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 162 | // Emit any other data associated with the key (i.e., stat information). |
| 163 | V.EmitData(Out); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 164 | } |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 165 | }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 166 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 167 | class OffsetOpt { |
| 168 | bool valid; |
| 169 | Offset off; |
| 170 | public: |
| 171 | OffsetOpt() : valid(false) {} |
| 172 | bool hasOffset() const { return valid; } |
| 173 | Offset getOffset() const { assert(valid); return off; } |
| 174 | void setOffset(Offset o) { off = o; valid = true; } |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 175 | }; |
| 176 | } // end anonymous namespace |
| 177 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 178 | typedef llvm::OnDiskChainedHashTableGenerator<FileEntryPTHEntryInfo> PTHMap; |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 179 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 180 | namespace { |
Benjamin Kramer | bd21828 | 2009-11-28 10:07:24 +0000 | [diff] [blame] | 181 | class PTHWriter { |
Kovarththanan Rajaratnam | 622ab50 | 2010-03-18 07:45:30 +0000 | [diff] [blame] | 182 | typedef llvm::DenseMap<const IdentifierInfo*,uint32_t> IDMap; |
| 183 | typedef llvm::StringMap<OffsetOpt, llvm::BumpPtrAllocator> CachedStrsTy; |
| 184 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 185 | IDMap IM; |
| 186 | llvm::raw_fd_ostream& Out; |
| 187 | Preprocessor& PP; |
| 188 | uint32_t idcount; |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 189 | PTHMap PM; |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 190 | CachedStrsTy CachedStrs; |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 191 | Offset CurStrOffset; |
| 192 | std::vector<llvm::StringMapEntry<OffsetOpt>*> StrEntries; |
Ted Kremenek | 8f174e1 | 2008-12-23 02:52:12 +0000 | [diff] [blame] | 193 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 194 | //// Get the persistent id for the given IdentifierInfo*. |
| 195 | uint32_t ResolveID(const IdentifierInfo* II); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 196 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 197 | /// Emit a token to the PTH file. |
| 198 | void EmitToken(const Token& T); |
| 199 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 200 | void Emit8(uint32_t V) { |
| 201 | using namespace llvm::support; |
| 202 | endian::Writer<little>(Out).write<uint8_t>(V); |
| 203 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 204 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 205 | void Emit16(uint32_t V) { |
| 206 | using namespace llvm::support; |
| 207 | endian::Writer<little>(Out).write<uint16_t>(V); |
| 208 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 209 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 210 | void Emit32(uint32_t V) { |
| 211 | using namespace llvm::support; |
| 212 | endian::Writer<little>(Out).write<uint32_t>(V); |
| 213 | } |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 214 | |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 215 | void EmitBuf(const char *Ptr, unsigned NumBytes) { |
| 216 | Out.write(Ptr, NumBytes); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 217 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 218 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 219 | void EmitString(StringRef V) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 220 | using namespace llvm::support; |
| 221 | endian::Writer<little>(Out).write<uint16_t>(V.size()); |
Kovarththanan Rajaratnam | c3cde07 | 2010-03-14 08:35:19 +0000 | [diff] [blame] | 222 | EmitBuf(V.data(), V.size()); |
| 223 | } |
| 224 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 225 | /// EmitIdentifierTable - Emits two tables to the PTH file. The first is |
| 226 | /// a hashtable mapping from identifier strings to persistent IDs. |
| 227 | /// The second is a straight table mapping from persistent IDs to string data |
| 228 | /// (the keys of the first table). |
Ted Kremenek | f1de464 | 2009-02-11 16:06:55 +0000 | [diff] [blame] | 229 | std::pair<Offset, Offset> EmitIdentifierTable(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 230 | |
Ted Kremenek | f1de464 | 2009-02-11 16:06:55 +0000 | [diff] [blame] | 231 | /// EmitFileTable - Emit a table mapping from file name strings to PTH |
| 232 | /// token data. |
| 233 | Offset EmitFileTable() { return PM.Emit(Out); } |
| 234 | |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 235 | PTHEntry LexTokens(Lexer& L); |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 236 | Offset EmitCachedSpellings(); |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 237 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 238 | public: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 239 | PTHWriter(llvm::raw_fd_ostream& out, Preprocessor& pp) |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 240 | : Out(out), PP(pp), idcount(0), CurStrOffset(0) {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 241 | |
Chris Lattner | 52ba870 | 2009-03-28 00:55:35 +0000 | [diff] [blame] | 242 | PTHMap &getPM() { return PM; } |
Kovarththanan Rajaratnam | 74e485e | 2010-03-14 07:38:15 +0000 | [diff] [blame] | 243 | void GeneratePTH(const std::string &MainFile); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 244 | }; |
| 245 | } // end anonymous namespace |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 246 | |
| 247 | uint32_t PTHWriter::ResolveID(const IdentifierInfo* II) { |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 248 | // Null IdentifierInfo's map to the persistent ID 0. |
| 249 | if (!II) |
| 250 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 251 | |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 252 | IDMap::iterator I = IM.find(II); |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 253 | if (I != IM.end()) |
| 254 | return I->second; // We've already added 1. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 255 | |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 256 | IM[II] = ++idcount; // Pre-increment since '0' is reserved for NULL. |
| 257 | return idcount; |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 258 | } |
| 259 | |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 260 | void PTHWriter::EmitToken(const Token& T) { |
Ted Kremenek | f2a223f | 2009-02-24 01:26:56 +0000 | [diff] [blame] | 261 | // Emit the token kind, flags, and length. |
| 262 | Emit32(((uint32_t) T.getKind()) | ((((uint32_t) T.getFlags())) << 8)| |
| 263 | (((uint32_t) T.getLength()) << 16)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 264 | |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 265 | if (!T.isLiteral()) { |
| 266 | Emit32(ResolveID(T.getIdentifierInfo())); |
| 267 | } else { |
Ted Kremenek | f2a223f | 2009-02-24 01:26:56 +0000 | [diff] [blame] | 268 | // We cache *un-cleaned* spellings. This gives us 100% fidelity with the |
| 269 | // source code. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 270 | StringRef s(T.getLiteralData(), T.getLength()); |
Ted Kremenek | 25cbd9f | 2009-02-24 00:30:21 +0000 | [diff] [blame] | 271 | |
Chris Lattner | 47246be | 2009-01-26 19:29:26 +0000 | [diff] [blame] | 272 | // Get the string entry. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame^] | 273 | auto &E = *CachedStrs.insert(std::make_pair(s, OffsetOpt())).first; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 274 | |
Ted Kremenek | f2a223f | 2009-02-24 01:26:56 +0000 | [diff] [blame] | 275 | // If this is a new string entry, bump the PTH offset. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame^] | 276 | if (!E.second.hasOffset()) { |
| 277 | E.second.setOffset(CurStrOffset); |
| 278 | StrEntries.push_back(&E); |
Jay Foad | 65aa688 | 2011-06-21 15:13:30 +0000 | [diff] [blame] | 279 | CurStrOffset += s.size() + 1; |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 280 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 281 | |
Ted Kremenek | 25cbd9f | 2009-02-24 00:30:21 +0000 | [diff] [blame] | 282 | // Emit the relative offset into the PTH file for the spelling string. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame^] | 283 | Emit32(E.second.getOffset()); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 284 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 285 | |
Ted Kremenek | 25cbd9f | 2009-02-24 00:30:21 +0000 | [diff] [blame] | 286 | // Emit the offset into the original source file of this token so that we |
| 287 | // can reconstruct its SourceLocation. |
Chris Lattner | 52c2908 | 2009-01-27 06:27:13 +0000 | [diff] [blame] | 288 | Emit32(PP.getSourceManager().getFileOffset(T.getLocation())); |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 289 | } |
| 290 | |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 291 | PTHEntry PTHWriter::LexTokens(Lexer& L) { |
Ted Kremenek | 7b78b7c | 2009-01-19 23:13:15 +0000 | [diff] [blame] | 292 | // Pad 0's so that we emit tokens to a 4-byte alignment. |
| 293 | // This speed up reading them back in. |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 294 | using namespace llvm::support; |
| 295 | endian::Writer<little> LE(Out); |
| 296 | uint32_t TokenOff = Out.tell(); |
| 297 | for (uint64_t N = llvm::OffsetToAlignment(TokenOff, 4); N; --N, ++TokenOff) |
| 298 | LE.write<uint8_t>(0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 299 | |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 300 | // Keep track of matching '#if' ... '#endif'. |
| 301 | typedef std::vector<std::pair<Offset, unsigned> > PPCondTable; |
| 302 | PPCondTable PPCond; |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 303 | std::vector<unsigned> PPStartCond; |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 304 | bool ParsingPreprocessorDirective = false; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 305 | Token Tok; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 306 | |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 307 | do { |
| 308 | L.LexFromRawLexer(Tok); |
Ted Kremenek | 726080d | 2009-02-10 22:43:16 +0000 | [diff] [blame] | 309 | NextToken: |
| 310 | |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 311 | if ((Tok.isAtStartOfLine() || Tok.is(tok::eof)) && |
| 312 | ParsingPreprocessorDirective) { |
Peter Collingbourne | 8402155 | 2011-02-28 02:37:51 +0000 | [diff] [blame] | 313 | // Insert an eod token into the token cache. It has the same |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 314 | // position as the next token that is not on the same line as the |
| 315 | // preprocessor directive. Observe that we continue processing |
| 316 | // 'Tok' when we exit this branch. |
| 317 | Token Tmp = Tok; |
Peter Collingbourne | 8402155 | 2011-02-28 02:37:51 +0000 | [diff] [blame] | 318 | Tmp.setKind(tok::eod); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 319 | Tmp.clearFlag(Token::StartOfLine); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 320 | Tmp.setIdentifierInfo(nullptr); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 321 | EmitToken(Tmp); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 322 | ParsingPreprocessorDirective = false; |
| 323 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 324 | |
Abramo Bagnara | c4bf2b9 | 2010-12-22 08:23:18 +0000 | [diff] [blame] | 325 | if (Tok.is(tok::raw_identifier)) { |
Kovarththanan Rajaratnam | 65cc1e8 | 2010-03-13 08:53:33 +0000 | [diff] [blame] | 326 | PP.LookUpIdentifierInfo(Tok); |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 327 | EmitToken(Tok); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 328 | continue; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 329 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 330 | |
| 331 | if (Tok.is(tok::hash) && Tok.isAtStartOfLine()) { |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 332 | // Special processing for #include. Store the '#' token and lex |
| 333 | // the next token. |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 334 | assert(!ParsingPreprocessorDirective); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 335 | Offset HashOff = (Offset) Out.tell(); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 336 | |
| 337 | // Get the next token. |
Ted Kremenek | 5c53f4c | 2010-07-27 02:58:57 +0000 | [diff] [blame] | 338 | Token NextTok; |
| 339 | L.LexFromRawLexer(NextTok); |
Chris Lattner | 2135619 | 2009-04-19 07:25:40 +0000 | [diff] [blame] | 340 | |
Ted Kremenek | 5c53f4c | 2010-07-27 02:58:57 +0000 | [diff] [blame] | 341 | // If we see the start of line, then we had a null directive "#". In |
| 342 | // this case, discard both tokens. |
| 343 | if (NextTok.isAtStartOfLine()) |
Chris Lattner | 2135619 | 2009-04-19 07:25:40 +0000 | [diff] [blame] | 344 | goto NextToken; |
Abramo Bagnara | c4bf2b9 | 2010-12-22 08:23:18 +0000 | [diff] [blame] | 345 | |
Ted Kremenek | 5c53f4c | 2010-07-27 02:58:57 +0000 | [diff] [blame] | 346 | // The token is the start of a directive. Emit it. |
| 347 | EmitToken(Tok); |
| 348 | Tok = NextTok; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 349 | |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 350 | // Did we see 'include'/'import'/'include_next'? |
Abramo Bagnara | c4bf2b9 | 2010-12-22 08:23:18 +0000 | [diff] [blame] | 351 | if (Tok.isNot(tok::raw_identifier)) { |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 352 | EmitToken(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 353 | continue; |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 354 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 355 | |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 356 | IdentifierInfo* II = PP.LookUpIdentifierInfo(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 357 | tok::PPKeywordKind K = II->getPPKeywordID(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 358 | |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 359 | ParsingPreprocessorDirective = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 360 | |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 361 | switch (K) { |
Chris Lattner | aa269c2 | 2009-04-19 07:32:03 +0000 | [diff] [blame] | 362 | case tok::pp_not_keyword: |
| 363 | // Invalid directives "#foo" can occur in #if 0 blocks etc, just pass |
| 364 | // them through. |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 365 | default: |
| 366 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 367 | |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 368 | case tok::pp_include: |
| 369 | case tok::pp_import: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 370 | case tok::pp_include_next: { |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 371 | // Save the 'include' token. |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 372 | EmitToken(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 373 | // Lex the next token as an include string. |
| 374 | L.setParsingPreprocessorDirective(true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 375 | L.LexIncludeFilename(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 376 | L.setParsingPreprocessorDirective(false); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 377 | assert(!Tok.isAtStartOfLine()); |
Abramo Bagnara | c4bf2b9 | 2010-12-22 08:23:18 +0000 | [diff] [blame] | 378 | if (Tok.is(tok::raw_identifier)) |
Kovarththanan Rajaratnam | 65cc1e8 | 2010-03-13 08:53:33 +0000 | [diff] [blame] | 379 | PP.LookUpIdentifierInfo(Tok); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 380 | |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 381 | break; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 382 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 383 | case tok::pp_if: |
| 384 | case tok::pp_ifdef: |
| 385 | case tok::pp_ifndef: { |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 386 | // Add an entry for '#if' and friends. We initially set the target |
| 387 | // index to 0. This will get backpatched when we hit #endif. |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 388 | PPStartCond.push_back(PPCond.size()); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 389 | PPCond.push_back(std::make_pair(HashOff, 0U)); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 390 | break; |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 391 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 392 | case tok::pp_endif: { |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 393 | // 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] | 394 | // This will later be set to zero when emitting to the PTH file. We |
| 395 | // use 0 for uninitialized indices because that is easier to debug. |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 396 | unsigned index = PPCond.size(); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 397 | // Backpatch the opening '#if' entry. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 398 | assert(!PPStartCond.empty()); |
| 399 | assert(PPCond.size() > PPStartCond.back()); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 400 | assert(PPCond[PPStartCond.back()].second == 0); |
| 401 | PPCond[PPStartCond.back()].second = index; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 402 | PPStartCond.pop_back(); |
| 403 | // Add the new entry to PPCond. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 404 | PPCond.push_back(std::make_pair(HashOff, index)); |
Ted Kremenek | 726080d | 2009-02-10 22:43:16 +0000 | [diff] [blame] | 405 | EmitToken(Tok); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 406 | |
Ted Kremenek | 726080d | 2009-02-10 22:43:16 +0000 | [diff] [blame] | 407 | // Some files have gibberish on the same line as '#endif'. |
| 408 | // Discard these tokens. |
Chris Lattner | d4b1446 | 2009-04-19 07:15:51 +0000 | [diff] [blame] | 409 | do |
| 410 | L.LexFromRawLexer(Tok); |
| 411 | while (Tok.isNot(tok::eof) && !Tok.isAtStartOfLine()); |
Ted Kremenek | 726080d | 2009-02-10 22:43:16 +0000 | [diff] [blame] | 412 | // We have the next token in hand. |
| 413 | // Don't immediately lex the next one. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 414 | goto NextToken; |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 415 | } |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 416 | case tok::pp_elif: |
| 417 | case tok::pp_else: { |
| 418 | // Add an entry for #elif or #else. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 419 | // This serves as both a closing and opening of a conditional block. |
| 420 | // This means that its entry will get backpatched later. |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 421 | unsigned index = PPCond.size(); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 422 | // Backpatch the previous '#if' entry. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 423 | assert(!PPStartCond.empty()); |
| 424 | assert(PPCond.size() > PPStartCond.back()); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 425 | assert(PPCond[PPStartCond.back()].second == 0); |
| 426 | PPCond[PPStartCond.back()].second = index; |
| 427 | PPStartCond.pop_back(); |
| 428 | // Now add '#elif' as a new block opening. |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 429 | PPCond.push_back(std::make_pair(HashOff, 0U)); |
| 430 | PPStartCond.push_back(index); |
Ted Kremenek | e5680f3 | 2008-12-23 01:30:52 +0000 | [diff] [blame] | 431 | break; |
| 432 | } |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 433 | } |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 434 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 435 | |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 436 | EmitToken(Tok); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 437 | } |
Ted Kremenek | e4f6b1e | 2009-02-10 22:27:09 +0000 | [diff] [blame] | 438 | while (Tok.isNot(tok::eof)); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 439 | |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 440 | assert(PPStartCond.empty() && "Error: imblanced preprocessor conditionals."); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 441 | |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 442 | // Next write out PPCond. |
| 443 | Offset PPCondOff = (Offset) Out.tell(); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 444 | |
| 445 | // 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] | 446 | Emit32(PPCond.size()); |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 447 | |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 448 | for (unsigned i = 0, e = PPCond.size(); i!=e; ++i) { |
Kovarththanan Rajaratnam | 8f0d270 | 2010-03-18 07:18:10 +0000 | [diff] [blame] | 449 | Emit32(PPCond[i].first - TokenOff); |
Ted Kremenek | dad7b34 | 2008-12-12 18:31:09 +0000 | [diff] [blame] | 450 | uint32_t x = PPCond[i].second; |
| 451 | assert(x != 0 && "PPCond entry not backpatched."); |
| 452 | // Emit zero for #endifs. This allows us to do checking when |
| 453 | // we read the PTH file back in. |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 454 | Emit32(x == i ? 0 : x); |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 455 | } |
| 456 | |
Kovarththanan Rajaratnam | 8f0d270 | 2010-03-18 07:18:10 +0000 | [diff] [blame] | 457 | return PTHEntry(TokenOff, PPCondOff); |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 458 | } |
| 459 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 460 | Offset PTHWriter::EmitCachedSpellings() { |
| 461 | // Write each cached strings to the PTH file. |
| 462 | Offset SpellingsOff = Out.tell(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 463 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 464 | for (std::vector<llvm::StringMapEntry<OffsetOpt>*>::iterator |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 465 | I = StrEntries.begin(), E = StrEntries.end(); I!=E; ++I) |
| 466 | EmitBuf((*I)->getKeyData(), (*I)->getKeyLength()+1 /*nul included*/); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 467 | |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 468 | return SpellingsOff; |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 469 | } |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 470 | |
Kovarththanan Rajaratnam | 74e485e | 2010-03-14 07:38:15 +0000 | [diff] [blame] | 471 | void PTHWriter::GeneratePTH(const std::string &MainFile) { |
Ted Kremenek | e1b6498 | 2009-01-26 21:43:14 +0000 | [diff] [blame] | 472 | // Generate the prologue. |
Richard Smith | c141b51 | 2012-08-17 03:55:43 +0000 | [diff] [blame] | 473 | Out << "cfe-pth" << '\0'; |
Ted Kremenek | 67d1505 | 2009-01-26 21:50:21 +0000 | [diff] [blame] | 474 | Emit32(PTHManager::Version); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 475 | |
Ted Kremenek | a4bd8eb | 2009-02-11 23:34:32 +0000 | [diff] [blame] | 476 | // Leave 4 words for the prologue. |
| 477 | Offset PrologueOffset = Out.tell(); |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 478 | for (unsigned i = 0; i < 4; ++i) |
| 479 | Emit32(0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 480 | |
Ted Kremenek | d5cded4 | 2009-03-19 22:10:38 +0000 | [diff] [blame] | 481 | // Write the name of the MainFile. |
Kovarththanan Rajaratnam | 2e6051a | 2010-03-14 07:55:43 +0000 | [diff] [blame] | 482 | if (!MainFile.empty()) { |
Kovarththanan Rajaratnam | 8f0d270 | 2010-03-18 07:18:10 +0000 | [diff] [blame] | 483 | EmitString(MainFile); |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 484 | } else { |
Ted Kremenek | d5cded4 | 2009-03-19 22:10:38 +0000 | [diff] [blame] | 485 | // String with 0 bytes. |
| 486 | Emit16(0); |
| 487 | } |
| 488 | Emit8(0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 489 | |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 490 | // Iterate over all the files in SourceManager. Create a lexer |
| 491 | // for each file and cache the tokens. |
Chris Lattner | c6fe32a | 2009-01-17 03:48:08 +0000 | [diff] [blame] | 492 | SourceManager &SM = PP.getSourceManager(); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 493 | const LangOptions &LOpts = PP.getLangOpts(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 494 | |
Chris Lattner | c6fe32a | 2009-01-17 03:48:08 +0000 | [diff] [blame] | 495 | for (SourceManager::fileinfo_iterator I = SM.fileinfo_begin(), |
| 496 | E = SM.fileinfo_end(); I != E; ++I) { |
Chris Lattner | 0d0bf8c | 2009-02-03 07:30:45 +0000 | [diff] [blame] | 497 | const SrcMgr::ContentCache &C = *I->second; |
Argyrios Kyrtzidis | b1c8649 | 2011-03-05 01:03:53 +0000 | [diff] [blame] | 498 | const FileEntry *FE = C.OrigEntry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 499 | |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 500 | // FIXME: Handle files with non-absolute paths. |
Michael J. Spencer | 256053b | 2010-12-17 21:22:22 +0000 | [diff] [blame] | 501 | if (llvm::sys::path::is_relative(FE->getName())) |
Ted Kremenek | fc7e2ea | 2008-12-02 19:44:08 +0000 | [diff] [blame] | 502 | continue; |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 503 | |
Chris Lattner | e127a0d | 2010-04-20 20:35:58 +0000 | [diff] [blame] | 504 | const llvm::MemoryBuffer *B = C.getBuffer(PP.getDiagnostics(), SM); |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 505 | if (!B) continue; |
Ted Kremenek | fb645b6 | 2008-12-11 23:36:38 +0000 | [diff] [blame] | 506 | |
Chris Lattner | 2b2453a | 2009-01-17 06:22:33 +0000 | [diff] [blame] | 507 | FileID FID = SM.createFileID(FE, SourceLocation(), SrcMgr::C_User); |
Chris Lattner | 6e29014 | 2009-11-30 04:18:44 +0000 | [diff] [blame] | 508 | const llvm::MemoryBuffer *FromFile = SM.getBuffer(FID); |
| 509 | Lexer L(FID, FromFile, SM, LOpts); |
Ted Kremenek | d8c0292 | 2009-02-10 22:16:22 +0000 | [diff] [blame] | 510 | PM.insert(FE, LexTokens(L)); |
Daniel Dunbar | 31309ab | 2008-11-26 02:18:33 +0000 | [diff] [blame] | 511 | } |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 512 | |
| 513 | // Write out the identifier table. |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 514 | const std::pair<Offset,Offset> &IdTableOff = EmitIdentifierTable(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 515 | |
Ted Kremenek | be29533 | 2009-01-08 02:44:06 +0000 | [diff] [blame] | 516 | // Write out the cached strings table. |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 517 | Offset SpellingOff = EmitCachedSpellings(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 518 | |
Ted Kremenek | a3d764c | 2008-11-26 03:36:26 +0000 | [diff] [blame] | 519 | // Write out the file table. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 520 | Offset FileTableOff = EmitFileTable(); |
| 521 | |
Ted Kremenek | a4bd8eb | 2009-02-11 23:34:32 +0000 | [diff] [blame] | 522 | // Finally, write the prologue. |
| 523 | Out.seek(PrologueOffset); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 524 | Emit32(IdTableOff.first); |
Ted Kremenek | f1de464 | 2009-02-11 16:06:55 +0000 | [diff] [blame] | 525 | Emit32(IdTableOff.second); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 526 | Emit32(FileTableOff); |
Ted Kremenek | 277faca | 2009-01-27 00:01:05 +0000 | [diff] [blame] | 527 | Emit32(SpellingOff); |
Ted Kremenek | b978c66 | 2009-01-08 01:17:37 +0000 | [diff] [blame] | 528 | } |
| 529 | |
Chris Lattner | 52ba870 | 2009-03-28 00:55:35 +0000 | [diff] [blame] | 530 | namespace { |
| 531 | /// StatListener - A simple "interpose" object used to monitor stat calls |
| 532 | /// invoked by FileManager while processing the original sources used |
| 533 | /// as input to PTH generation. StatListener populates the PTHWriter's |
| 534 | /// file map with stat information for directories as well as negative stats. |
| 535 | /// Stat information for files are populated elsewhere. |
Chris Lattner | 10e286a | 2010-11-23 19:19:34 +0000 | [diff] [blame] | 536 | class StatListener : public FileSystemStatCache { |
Chris Lattner | 52ba870 | 2009-03-28 00:55:35 +0000 | [diff] [blame] | 537 | PTHMap &PM; |
| 538 | public: |
| 539 | StatListener(PTHMap &pm) : PM(pm) {} |
| 540 | ~StatListener() {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 541 | |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 542 | LookupResult getStat(const char *Path, FileData &Data, bool isFile, |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 543 | std::unique_ptr<vfs::File> *F, |
| 544 | vfs::FileSystem &FS) override { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 545 | LookupResult Result = statChained(Path, Data, isFile, F, FS); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 546 | |
Chris Lattner | d6f6111 | 2010-11-23 20:05:15 +0000 | [diff] [blame] | 547 | if (Result == CacheMissing) // Failed 'stat'. |
Chris Lattner | 10e286a | 2010-11-23 19:19:34 +0000 | [diff] [blame] | 548 | PM.insert(PTHEntryKeyVariant(Path), PTHEntry()); |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 549 | else if (Data.IsDirectory) { |
Chris Lattner | 52ba870 | 2009-03-28 00:55:35 +0000 | [diff] [blame] | 550 | // Only cache directories with absolute paths. |
Michael J. Spencer | 256053b | 2010-12-17 21:22:22 +0000 | [diff] [blame] | 551 | if (llvm::sys::path::is_relative(Path)) |
Chris Lattner | 10e286a | 2010-11-23 19:19:34 +0000 | [diff] [blame] | 552 | return Result; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 553 | |
Rafael Espindola | 0fda0f7 | 2013-08-01 21:42:11 +0000 | [diff] [blame] | 554 | PM.insert(PTHEntryKeyVariant(&Data, Path), PTHEntry()); |
Chris Lattner | 52ba870 | 2009-03-28 00:55:35 +0000 | [diff] [blame] | 555 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 556 | |
Chris Lattner | 10e286a | 2010-11-23 19:19:34 +0000 | [diff] [blame] | 557 | return Result; |
Chris Lattner | 52ba870 | 2009-03-28 00:55:35 +0000 | [diff] [blame] | 558 | } |
| 559 | }; |
| 560 | } // end anonymous namespace |
| 561 | |
| 562 | |
Eli Friedman | f54fce8 | 2009-05-19 01:02:07 +0000 | [diff] [blame] | 563 | void clang::CacheTokens(Preprocessor &PP, llvm::raw_fd_ostream* OS) { |
Ted Kremenek | d5cded4 | 2009-03-19 22:10:38 +0000 | [diff] [blame] | 564 | // Get the name of the main file. |
| 565 | const SourceManager &SrcMgr = PP.getSourceManager(); |
| 566 | const FileEntry *MainFile = SrcMgr.getFileEntryForID(SrcMgr.getMainFileID()); |
Dylan Noblesmith | f7ccbad | 2012-02-05 02:13:05 +0000 | [diff] [blame] | 567 | SmallString<128> MainFilePath(MainFile->getName()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 568 | |
Michael J. Spencer | fbfd180 | 2010-12-21 16:45:57 +0000 | [diff] [blame] | 569 | llvm::sys::fs::make_absolute(MainFilePath); |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 570 | |
| 571 | // Create the PTHWriter. |
Eli Friedman | f54fce8 | 2009-05-19 01:02:07 +0000 | [diff] [blame] | 572 | PTHWriter PW(*OS, PP); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 573 | |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 574 | // Install the 'stat' system call listener in the FileManager. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame^] | 575 | auto StatCacheOwner = llvm::make_unique<StatListener>(PW.getPM()); |
| 576 | StatListener *StatCache = StatCacheOwner.get(); |
| 577 | PP.getFileManager().addStatCache(std::move(StatCacheOwner), |
| 578 | /*AtBeginning=*/true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 579 | |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 580 | // Lex through the entire file. This will populate SourceManager with |
| 581 | // all of the header information. |
| 582 | Token Tok; |
Chris Lattner | e127a0d | 2010-04-20 20:35:58 +0000 | [diff] [blame] | 583 | PP.EnterMainSourceFile(); |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 584 | do { PP.Lex(Tok); } while (Tok.isNot(tok::eof)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 585 | |
Ted Kremenek | ad6ce5c | 2009-02-13 22:07:44 +0000 | [diff] [blame] | 586 | // Generate the PTH file. |
Douglas Gregor | 52e7108 | 2009-10-16 18:18:30 +0000 | [diff] [blame] | 587 | PP.getFileManager().removeStatCache(StatCache); |
Kovarththanan Rajaratnam | 74e485e | 2010-03-14 07:38:15 +0000 | [diff] [blame] | 588 | PW.GeneratePTH(MainFilePath.str()); |
Ted Kremenek | 8588896 | 2008-10-21 00:54:44 +0000 | [diff] [blame] | 589 | } |
Ted Kremenek | e0ea5dc | 2009-02-10 01:06:17 +0000 | [diff] [blame] | 590 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 591 | //===----------------------------------------------------------------------===// |
| 592 | |
Kovarththanan Rajaratnam | 48673e6 | 2010-03-14 06:48:05 +0000 | [diff] [blame] | 593 | namespace { |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 594 | class PTHIdKey { |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 595 | public: |
| 596 | const IdentifierInfo* II; |
| 597 | uint32_t FileOffset; |
| 598 | }; |
| 599 | |
Benjamin Kramer | bd21828 | 2009-11-28 10:07:24 +0000 | [diff] [blame] | 600 | class PTHIdentifierTableTrait { |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 601 | public: |
Ted Kremenek | a4b44dd | 2009-02-13 19:13:46 +0000 | [diff] [blame] | 602 | typedef PTHIdKey* key_type; |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 603 | typedef key_type key_type_ref; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 604 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 605 | typedef uint32_t data_type; |
| 606 | typedef data_type data_type_ref; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 607 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 608 | typedef unsigned hash_value_type; |
| 609 | typedef unsigned offset_type; |
| 610 | |
| 611 | static hash_value_type ComputeHash(PTHIdKey* key) { |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 612 | return llvm::HashString(key->II->getName()); |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 613 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 614 | |
| 615 | static std::pair<unsigned,unsigned> |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 616 | EmitKeyDataLength(raw_ostream& Out, const PTHIdKey* key, uint32_t) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 617 | using namespace llvm::support; |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 618 | unsigned n = key->II->getLength() + 1; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 619 | endian::Writer<little>(Out).write<uint16_t>(n); |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 620 | return std::make_pair(n, sizeof(uint32_t)); |
| 621 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 622 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 623 | static void EmitKey(raw_ostream& Out, PTHIdKey* key, unsigned n) { |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 624 | // Record the location of the key data. This is used when generating |
| 625 | // the mapping from persistent IDs to strings. |
| 626 | key->FileOffset = Out.tell(); |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 627 | Out.write(key->II->getNameStart(), n); |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 628 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 629 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 630 | static void EmitData(raw_ostream& Out, PTHIdKey*, uint32_t pID, |
Ted Kremenek | 337edcd | 2009-02-12 03:26:59 +0000 | [diff] [blame] | 631 | unsigned) { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 632 | using namespace llvm::support; |
| 633 | endian::Writer<little>(Out).write<uint32_t>(pID); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 634 | } |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 635 | }; |
| 636 | } // end anonymous namespace |
| 637 | |
| 638 | /// EmitIdentifierTable - Emits two tables to the PTH file. The first is |
| 639 | /// a hashtable mapping from identifier strings to persistent IDs. The second |
| 640 | /// is a straight table mapping from persistent IDs to string data (the |
| 641 | /// keys of the first table). |
| 642 | /// |
| 643 | std::pair<Offset,Offset> PTHWriter::EmitIdentifierTable() { |
| 644 | // Build two maps: |
| 645 | // (1) an inverse map from persistent IDs -> (IdentifierInfo*,Offset) |
| 646 | // (2) a map from (IdentifierInfo*, Offset)* -> persistent IDs |
| 647 | |
| 648 | // Note that we use 'calloc', so all the bytes are 0. |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 649 | PTHIdKey *IIDMap = (PTHIdKey*)calloc(idcount, sizeof(PTHIdKey)); |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 650 | |
| 651 | // Create the hashtable. |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 652 | llvm::OnDiskChainedHashTableGenerator<PTHIdentifierTableTrait> IIOffMap; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 653 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 654 | // Generate mapping from persistent IDs -> IdentifierInfo*. |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 655 | for (IDMap::iterator I = IM.begin(), E = IM.end(); I != E; ++I) { |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 656 | // Decrement by 1 because we are using a vector for the lookup and |
| 657 | // 0 is reserved for NULL. |
| 658 | assert(I->second > 0); |
| 659 | assert(I->second-1 < idcount); |
| 660 | unsigned idx = I->second-1; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 661 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 662 | // Store the mapping from persistent ID to IdentifierInfo* |
| 663 | IIDMap[idx].II = I->first; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 664 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 665 | // Store the reverse mapping in a hashtable. |
| 666 | IIOffMap.insert(&IIDMap[idx], I->second); |
| 667 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 668 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 669 | // Write out the inverse map first. This causes the PCIDKey entries to |
| 670 | // record PTH file offsets for the string data. This is used to write |
| 671 | // the second table. |
| 672 | Offset StringTableOffset = IIOffMap.Emit(Out); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 673 | |
| 674 | // Now emit the table mapping from persistent IDs to PTH file offsets. |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 675 | Offset IDOff = Out.tell(); |
| 676 | Emit32(idcount); // Emit the number of identifiers. |
Chris Lattner | f239036 | 2009-03-28 00:16:20 +0000 | [diff] [blame] | 677 | for (unsigned i = 0 ; i < idcount; ++i) |
| 678 | Emit32(IIDMap[i].FileOffset); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 679 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 680 | // Finally, release the inverse map. |
| 681 | free(IIDMap); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 682 | |
Ted Kremenek | 7e3a004 | 2009-02-11 21:29:16 +0000 | [diff] [blame] | 683 | return std::make_pair(IDOff, StringTableOffset); |
| 684 | } |