PTHLexer.cpp revision 6b1c9708c8fca3786c766b6d1869721656b31322
1274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek//===--- PTHLexer.cpp - Lex from a token stream ---------------------------===// 2274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 3274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// The LLVM Compiler Infrastructure 4274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 5274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// This file is distributed under the University of Illinois Open Source 6274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// License. See LICENSE.TXT for details. 7274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 8274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek//===----------------------------------------------------------------------===// 9274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 10274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// This file implements the PTHLexer interface. 11274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 12274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek//===----------------------------------------------------------------------===// 13274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/TokenKinds.h" 150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/FileManager.h" 160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/IdentifierTable.h" 17274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/PTHLexer.h" 18274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/Preprocessor.h" 190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/PTHManager.h" 200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Token.h" 210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Preprocessor.h" 220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/Support/Compiler.h" 230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/Support/MemoryBuffer.h" 240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/ADT/StringMap.h" 250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/ADT/OwningPtr.h" 260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 27274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekusing namespace clang; 28274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 298f174e173c1fa195151a86a8cbd7611dde5e2b1aTed Kremenek#define DISK_TOKEN_SIZE (2+4+4+2) 30268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 31e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 32e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// Utility methods for reading from the mmap'ed PTH file. 33e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 34e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 35e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekstatic inline uint8_t Read8(const char*& data) { 36e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek return (uint8_t) *(data++); 37e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek} 38e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 39e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekstatic inline uint32_t Read32(const char*& data) { 40e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek uint32_t V = (uint32_t) Read8(data); 41e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek V |= (((uint32_t) Read8(data)) << 8); 42e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek V |= (((uint32_t) Read8(data)) << 16); 43e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek V |= (((uint32_t) Read8(data)) << 24); 44e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek return V; 45e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek} 46e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 47e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 48e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// PTHLexer methods. 49e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 50e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 510c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHLexer::PTHLexer(Preprocessor& pp, SourceLocation fileloc, const char* D, 52268ee7016a2811803989487c0ad3799486092c63Ted Kremenek const char* ppcond, PTHManager& PM) 53cd223444d1680290efe11da657faafc9a1ac14baTed Kremenek : PreprocessorLexer(&pp, fileloc), TokBuf(D), CurPtr(D), LastHashTokPtr(0), 54e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek PPCond(ppcond), CurPPCondPtr(ppcond), PTHMgr(PM) {} 55274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 56e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekvoid PTHLexer::Lex(Token& Tok) { 57e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted KremenekLexNextToken: 58866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 59866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 60866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read the raw token data. 61866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 62e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 63866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Shadow CurPtr into an automatic variable. 64866bdf74547efe32c320554837ffce00fcc084feTed Kremenek const unsigned char *CurPtrShadow = (const unsigned char*) CurPtr; 65866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 66866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read in the data for the token. 14 bytes in total. 67866bdf74547efe32c320554837ffce00fcc084feTed Kremenek tok::TokenKind k = (tok::TokenKind) CurPtrShadow[0]; 68866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Token::TokenFlags flags = (Token::TokenFlags) CurPtrShadow[1]; 69866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 706b1c9708c8fca3786c766b6d1869721656b31322Ted Kremenek uint32_t perID = ((uint32_t) CurPtrShadow[2]) 71866bdf74547efe32c320554837ffce00fcc084feTed Kremenek | (((uint32_t) CurPtrShadow[3]) << 8) 72866bdf74547efe32c320554837ffce00fcc084feTed Kremenek | (((uint32_t) CurPtrShadow[4]) << 16) 73866bdf74547efe32c320554837ffce00fcc084feTed Kremenek | (((uint32_t) CurPtrShadow[5]) << 24); 740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 75866bdf74547efe32c320554837ffce00fcc084feTed Kremenek uint32_t FileOffset = ((uint32_t) CurPtrShadow[6]) 76866bdf74547efe32c320554837ffce00fcc084feTed Kremenek | (((uint32_t) CurPtrShadow[7]) << 8) 77866bdf74547efe32c320554837ffce00fcc084feTed Kremenek | (((uint32_t) CurPtrShadow[8]) << 16) 78866bdf74547efe32c320554837ffce00fcc084feTed Kremenek | (((uint32_t) CurPtrShadow[9]) << 24); 79e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 80866bdf74547efe32c320554837ffce00fcc084feTed Kremenek uint32_t Len = ((uint32_t) CurPtrShadow[10]) 818f174e173c1fa195151a86a8cbd7611dde5e2b1aTed Kremenek | (((uint32_t) CurPtrShadow[11]) << 8); 82e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 83866bdf74547efe32c320554837ffce00fcc084feTed Kremenek CurPtr = (const char*) (CurPtrShadow + DISK_TOKEN_SIZE); 84e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 85866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 86866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Construct the token itself. 87866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 88e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 89866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.startToken(); 90866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setKind(k); 91866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setFlag(flags); 926b1c9708c8fca3786c766b6d1869721656b31322Ted Kremenek Tok.setIdentifierInfo(perID ? PTHMgr.GetIdentifierInfo(perID-1) : 0); 93866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLocation(SourceLocation::getFileLoc(FileID, FileOffset)); 94866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLength(Len); 9589d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 96866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 97866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Process the token. 98866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 9989d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 100e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (Tok.is(tok::eof)) { 101e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 102e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 103e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 104cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 105cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 106cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek if (LexEndOfFile(Tok)) 107d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 108274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 109cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek assert(PPCache && "Raw buffer::LexEndOfFile should return a token"); 110cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PPCache->Lex(Tok); 111cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 112e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 113e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek MIOpt.ReadToken(); 114274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 115e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (Tok.is(tok::eom)) { 116d6f53dc4951aace69014619761760addac9e59ecTed Kremenek ParsingPreprocessorDirective = false; 117274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek return; 118274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek } 119d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 120e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek#if 0 121e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek SourceManager& SM = PP->getSourceManager(); 122e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek SourceLocation L = Tok.getLocation(); 123e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 124e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek static const char* last = 0; 125e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek const char* next = SM.getContentCacheForLoc(L)->Entry->getName(); 126e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (next != last) { 127e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek last = next; 128e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek llvm::cerr << next << '\n'; 129e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 130e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 131e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek llvm::cerr << "line " << SM.getLogicalLineNumber(L) << " col " << 132e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek SM.getLogicalColumnNumber(L) << '\n'; 133e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek#endif 134d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 135d6f53dc4951aace69014619761760addac9e59ecTed Kremenek if (Tok.is(tok::hash)) { 136268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (Tok.isAtStartOfLine()) { 137268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 138268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (!LexingRawMode) { 139268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PP->HandleDirective(Tok); 140d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 141268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (PP->isCurrentLexer(this)) 142268ee7016a2811803989487c0ad3799486092c63Ted Kremenek goto LexNextToken; 143268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 144268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return PP->Lex(Tok); 145268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 146d6f53dc4951aace69014619761760addac9e59ecTed Kremenek } 147274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek } 148d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 149d6f53dc4951aace69014619761760addac9e59ecTed Kremenek if (Tok.is(tok::identifier)) { 150e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (LexingRawMode) { 151e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.setIdentifierInfo(0); 152e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek return; 153e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 154e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 155d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return PP->HandleIdentifier(Tok); 156e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 157e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 158e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 159e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(!Tok.is(tok::eom) || ParsingPreprocessorDirective); 160274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 161274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 162e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: This method can just be inlined into Lex(). 163cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenekbool PTHLexer::LexEndOfFile(Token &Tok) { 164e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(!ParsingPreprocessorDirective); 165e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(!LexingRawMode); 166cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 167cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek // FIXME: Issue diagnostics similar to Lexer. 168cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PP->HandleEndOfFile(Tok, false); 169cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 170cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 171e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 172e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 173274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekvoid PTHLexer::setEOF(Token& Tok) { 1740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(!EofToken.is(tok::eof)); 1750c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 176274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 17717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 17817ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 17917ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 18017ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1814d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 182e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 183e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 184e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 185e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 18674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 18774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 18874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 18974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek const char* p = CurPtr; 19074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 19174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 19274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 19374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 194e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 19574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 19674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 19780d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 19874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 19974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 20074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 20174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 20274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 20374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 20417ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 2050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 206268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 207268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 208268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 209268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 210268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 21141a2660377d215d004fe413c03874bd066b5384cTed Kremenek const char* HashEntryI = 0; 212268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t Offset; 213268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 214268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 215268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 21641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 217268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Offset = Read32(CurPPCondPtr); 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the target table index from the side-table. 220268ee7016a2811803989487c0ad3799486092c63Ted Kremenek TableIdx = Read32(CurPPCondPtr); 22141a2660377d215d004fe413c03874bd066b5384cTed Kremenek 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 22341a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 22441a2660377d215d004fe413c03874bd066b5384cTed Kremenek 22541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 22641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 22741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 22841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 22941a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 23041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 23141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 23241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 23341a2660377d215d004fe413c03874bd066b5384cTed Kremenek const char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 23441a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 23541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 23641a2660377d215d004fe413c03874bd066b5384cTed Kremenek uint32_t TmpOffset = Read32(NextPPCondPtr); 23741a2660377d215d004fe413c03874bd066b5384cTed Kremenek const char* HashEntryJ = TokBuf + TmpOffset; 23841a2660377d215d004fe413c03874bd066b5384cTed Kremenek 23941a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 24041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 24141a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 24241a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 24341a2660377d215d004fe413c03874bd066b5384cTed Kremenek TableIdx = Read32(NextPPCondPtr); 24441a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 24541a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 24641a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 247268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 24841a2660377d215d004fe413c03874bd066b5384cTed Kremenek while (HashEntryI < LastHashTokPtr); 24941a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 250268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 251268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 252268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 253268ee7016a2811803989487c0ad3799486092c63Ted Kremenek const char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 25841a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Read32(NextPPCondPtr); 259268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t NextIdx = Read32(NextPPCondPtr); 260268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 261268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 262268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 263268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 265268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 266268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 268268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 269268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 270268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 271268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 272268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 27441a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 27541a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 276268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 277268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 278e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 279268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 28041a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 281268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 282268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 283268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 284268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 285268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 28641a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 287268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 288268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 289268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 290268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 291268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 292e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 293e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(((tok::TokenKind) (unsigned char) *CurPtr) == tok::hash); 294e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 295e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 296268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 297e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 298268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 299268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 300268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 301268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 30230a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 30330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // getLocation is not on the hot path. It is used to get the location of 30430a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // the next token when transitioning back to this lexer when done 30530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 30630a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 30730a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 30830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek const char* p = CurPtr + (1 + 1 + 4); 30930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek uint32_t offset = 31030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek ((uint32_t) ((uint8_t) p[0])) 31130a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek | (((uint32_t) ((uint8_t) p[1])) << 8) 31230a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek | (((uint32_t) ((uint8_t) p[2])) << 16) 31330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek | (((uint32_t) ((uint8_t) p[3])) << 24); 31430a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek return SourceLocation::getFileLoc(FileID, offset); 31530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 31630a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 3170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// Internal Data Structures for PTH file lookup and resolving identifiers. 3190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 3230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 3240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 3250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 3260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookup { 3270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 3280c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek class Val { 329fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t TokenOff; 330fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t PPCondOff; 3310c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3320c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek public: 333fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek Val() : TokenOff(~0) {} 334fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek Val(uint32_t toff, uint32_t poff) : TokenOff(toff), PPCondOff(poff) {} 3350c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 336fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t getTokenOffset() const { 337fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek assert(TokenOff != ~((uint32_t)0) && "PTHFileLookup entry initialized."); 338fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return TokenOff; 3390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 341fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t gettPPCondOffset() const { 342fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek assert(TokenOff != ~((uint32_t)0) && "PTHFileLookup entry initialized."); 343fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return PPCondOff; 344fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek } 345fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek 346fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek bool isValid() const { return TokenOff != ~((uint32_t)0); } 3470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek }; 3480c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3490c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekprivate: 3500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::StringMap<Val> FileMap; 3510c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 3530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek PTHFileLookup() {}; 3540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Val Lookup(const FileEntry* FE) { 3560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* s = FE->getName(); 3570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek unsigned size = strlen(s); 3580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return FileMap.GetOrCreateValue(s, s+size).getValue(); 3590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek void ReadTable(const char* D) { 3620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek uint32_t N = Read32(D); // Read the length of the table. 3630c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3640c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek for ( ; N > 0; --N) { // The rest of the data is the table itself. 3650c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek uint32_t len = Read32(D); 3660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* s = D; 3670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek D += len; 368fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t TokenOff = Read32(D); 369fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek FileMap.GetOrCreateValue(s, s+len).getValue() = Val(TokenOff, Read32(D)); 3700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3720c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 3730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} // end anonymous namespace 3740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3750c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3760c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 3770c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3780c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3790c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 380cf58e6249c6b018508e34bcb76202caa42d2451aTed Kremenek const char* idDataTable, IdentifierInfo** perIDCache, 3816183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek Preprocessor& pp) 3826183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 3836183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek IdDataTable(idDataTable), ITable(pp.getIdentifierTable()), PP(pp) {} 3840c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3850c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 3860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 3870c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 3880e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 3890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 3900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3910c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager* PTHManager::Create(const std::string& file, Preprocessor& PP) { 3920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 3940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 3950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 3960c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3970c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!File) 3980c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 3990c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4000c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 4010c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 4020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* BufBeg = File->getBufferStart(); 4030c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* BufEnd = File->getBufferEnd(); 4040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if(!(BufEnd > BufBeg + sizeof(uint32_t)*3)) { 4060c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 4070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4080c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the address of the index table at the end of the PTH file. 4110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // This table contains the offset of the file lookup table, the 4120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // persistent ID -> identifer data table. 4130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* EndTable = BufEnd - sizeof(uint32_t)*3; 4140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 4160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 4170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* FileTableOffset = EndTable + sizeof(uint32_t)*2; 4180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* FileTable = BufBeg + Read32(FileTableOffset); 4190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 4210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 4220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(new PTHFileLookup()); 4260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek FL->ReadTable(FileTable); 4270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4280c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 4290c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 4300c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* IDTableOffset = EndTable + sizeof(uint32_t)*1; 4310c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* IData = BufBeg + Read32(IDTableOffset); 4320c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(IData > BufBeg && IData < BufEnd)) { 4330c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 4340c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4350c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4360c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4376183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 4386183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek uint32_t NumIds = Read32(IData); 4396183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 4406183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 4416183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 4426183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 4436183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek IdentifierInfo** PerIDCache = 4446183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek (IdentifierInfo**) calloc(NumIds, sizeof(*PerIDCache)); 4456183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 4466183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek if (!PerIDCache) { 4476183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek assert(false && "Could not allocate Persistent ID cache."); 4486183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek return 0; 4496183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 4506183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 4516183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Create the new lexer. 4526183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, PP); 4530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 455866bdf74547efe32c320554837ffce00fcc084feTed KremenekIdentifierInfo* PTHManager::GetIdentifierInfo(unsigned persistentID) { 456866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 4570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Check if the IdentifierInfo has already been resolved. 458cf58e6249c6b018508e34bcb76202caa42d2451aTed Kremenek IdentifierInfo*& II = PerIDCache[persistentID]; 4590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (II) return II; 4600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 4620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* TableEntry = IdDataTable + sizeof(uint32_t) * persistentID; 4630c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* IDData = Buf->getBufferStart() + Read32(TableEntry); 4640c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(IDData < Buf->getBufferEnd()); 4650c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Read the length of the string. 4670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek uint32_t len = Read32(IDData); 4680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4690c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the IdentifierInfo* with the specified string. 4700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek II = &ITable.get(IDData, IDData+len); 4710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 4720c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4740c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHLexer* PTHManager::CreateLexer(unsigned FileID, const FileEntry* FE) { 4750c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4760c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 4770c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4780c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4790c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 4800c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 4810c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 482fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek PTHFileLookup::Val FileData = ((PTHFileLookup*) FileLookup)->Lookup(FE); 4830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 484fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek if (!FileData.isValid()) // No tokens available. 4850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4870c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 488fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek const char* data = Buf->getBufferStart() + FileData.getTokenOffset(); 489268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 490268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 491268ee7016a2811803989487c0ad3799486092c63Ted Kremenek const char* ppcond = Buf->getBufferStart() + FileData.gettPPCondOffset(); 492268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t len = Read32(ppcond); 493268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (len == 0) ppcond = 0; 494268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 4950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(data < Buf->getBufferEnd()); 496268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return new PTHLexer(PP, SourceLocation::getFileLoc(FileID, 0), data, ppcond, 497268ee7016a2811803989487c0ad3799486092c63Ted Kremenek *this); 4980c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 499