PTHLexer.cpp revision e5680f3cd678014cf0872d34726dc804b0cbbdd4
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 29268ee7016a2811803989487c0ad3799486092c63Ted Kremenek#define DISK_TOKEN_SIZE (2+3*4) 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: 58e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 59e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Read the token. 60e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // FIXME: Setting the flags directly should obviate this step. 61e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.startToken(); 620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 63e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Shadow CurPtr into an automatic variable so that Read8 doesn't load and 64e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // store back into the instance variable. 65e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek const char *CurPtrShadow = CurPtr; 6689d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 67e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Read the type of the token. 68e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.setKind((tok::TokenKind) Read8(CurPtrShadow)); 69e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 70e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Set flags. This is gross, since we are really setting multiple flags. 71e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.setFlag((Token::TokenFlags) Read8(CurPtrShadow)); 72e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 73e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Set the IdentifierInfo* (if any). 74e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.setIdentifierInfo(PTHMgr.ReadIdentifierInfo(CurPtrShadow)); 75e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 76e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Set the SourceLocation. Since all tokens are constructed using a 77e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // raw lexer, they will all be offseted from the same FileID. 78e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.setLocation(SourceLocation::getFileLoc(FileID, Read32(CurPtrShadow))); 79e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 80e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Finally, read and set the length of the token. 81e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.setLength(Read32(CurPtrShadow)); 8289d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 83e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr = CurPtrShadow; 8489d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 85e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (Tok.is(tok::eof)) { 86e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 87e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 88e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 89cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 90cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 91cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek if (LexEndOfFile(Tok)) 92d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 93274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 94cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek assert(PPCache && "Raw buffer::LexEndOfFile should return a token"); 95cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PPCache->Lex(Tok); 96cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 97e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 98e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek MIOpt.ReadToken(); 99274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 100e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (Tok.is(tok::eom)) { 101d6f53dc4951aace69014619761760addac9e59ecTed Kremenek ParsingPreprocessorDirective = false; 102274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek return; 103274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek } 104d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 105e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek#if 0 106e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek SourceManager& SM = PP->getSourceManager(); 107e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek SourceLocation L = Tok.getLocation(); 108e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 109e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek static const char* last = 0; 110e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek const char* next = SM.getContentCacheForLoc(L)->Entry->getName(); 111e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (next != last) { 112e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek last = next; 113e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek llvm::cerr << next << '\n'; 114e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 115e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 116e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek llvm::cerr << "line " << SM.getLogicalLineNumber(L) << " col " << 117e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek SM.getLogicalColumnNumber(L) << '\n'; 118e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek#endif 119d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 120d6f53dc4951aace69014619761760addac9e59ecTed Kremenek if (Tok.is(tok::hash)) { 121268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (Tok.isAtStartOfLine()) { 122268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 123268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (!LexingRawMode) { 124268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PP->HandleDirective(Tok); 125d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 126268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (PP->isCurrentLexer(this)) 127268ee7016a2811803989487c0ad3799486092c63Ted Kremenek goto LexNextToken; 128268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 129268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return PP->Lex(Tok); 130268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 131d6f53dc4951aace69014619761760addac9e59ecTed Kremenek } 132274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek } 133d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 134d6f53dc4951aace69014619761760addac9e59ecTed Kremenek if (Tok.is(tok::identifier)) { 135e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (LexingRawMode) { 136e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek Tok.setIdentifierInfo(0); 137e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek return; 138e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 139e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 140d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return PP->HandleIdentifier(Tok); 141e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 142e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 143e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 144e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(!Tok.is(tok::eom) || ParsingPreprocessorDirective); 145274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 146274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 147e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: This method can just be inlined into Lex(). 148cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenekbool PTHLexer::LexEndOfFile(Token &Tok) { 149e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(!ParsingPreprocessorDirective); 150e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(!LexingRawMode); 151cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 152cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek // FIXME: Issue diagnostics similar to Lexer. 153cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PP->HandleEndOfFile(Tok, false); 154cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 155cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 156e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 157e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 158274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekvoid PTHLexer::setEOF(Token& Tok) { 1590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(!EofToken.is(tok::eof)); 1600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 161274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 16217ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 16317ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 16417ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 16517ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1664d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 167e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 168e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 169e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 170e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 17174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 17274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 17374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 17474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek const char* p = CurPtr; 17574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 17674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 17774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 17874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 179e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 18074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 18174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 18280d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 18374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 18474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 18574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 18674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 18774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 18874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 18917ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 191268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 192268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 193268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 194268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 195268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 19641a2660377d215d004fe413c03874bd066b5384cTed Kremenek const char* HashEntryI = 0; 197268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t Offset; 198268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 199268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 200268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 20141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 202268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Offset = Read32(CurPPCondPtr); 20341a2660377d215d004fe413c03874bd066b5384cTed Kremenek 20441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the target table index from the side-table. 205268ee7016a2811803989487c0ad3799486092c63Ted Kremenek TableIdx = Read32(CurPPCondPtr); 20641a2660377d215d004fe413c03874bd066b5384cTed Kremenek 20741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 20841a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 20941a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 21141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 21241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 21341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 21441a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 21541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 21641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 21741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek const char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 22041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 22141a2660377d215d004fe413c03874bd066b5384cTed Kremenek uint32_t TmpOffset = Read32(NextPPCondPtr); 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek const char* HashEntryJ = TokBuf + TmpOffset; 22341a2660377d215d004fe413c03874bd066b5384cTed Kremenek 22441a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 22541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 22641a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 22741a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 22841a2660377d215d004fe413c03874bd066b5384cTed Kremenek TableIdx = Read32(NextPPCondPtr); 22941a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 23041a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 23141a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 232268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 23341a2660377d215d004fe413c03874bd066b5384cTed Kremenek while (HashEntryI < LastHashTokPtr); 23441a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 235268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 236268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 237268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 238268ee7016a2811803989487c0ad3799486092c63Ted Kremenek const char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 239268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 240268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 241268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 242268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 24341a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Read32(NextPPCondPtr); 244268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t NextIdx = Read32(NextPPCondPtr); 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 246268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 247268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 248268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 249268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 250268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 251268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 252268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 253268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 258268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 25941a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 26041a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 261268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 262268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 263e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 26541a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 266268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 268268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 269268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 270268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 27141a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 272268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 274268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 275268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 276268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 277e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 278e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek assert(((tok::TokenKind) (unsigned char) *CurPtr) == tok::hash); 279e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 280e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 281268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 282e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 283268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 284268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 285268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 286268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 28730a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 28830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // getLocation is not on the hot path. It is used to get the location of 28930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // the next token when transitioning back to this lexer when done 29030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 29130a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 29230a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 29330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek const char* p = CurPtr + (1 + 1 + 4); 29430a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek uint32_t offset = 29530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek ((uint32_t) ((uint8_t) p[0])) 29630a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek | (((uint32_t) ((uint8_t) p[1])) << 8) 29730a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek | (((uint32_t) ((uint8_t) p[2])) << 16) 29830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek | (((uint32_t) ((uint8_t) p[3])) << 24); 29930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek return SourceLocation::getFileLoc(FileID, offset); 30030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 30130a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 3020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3030c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// Internal Data Structures for PTH file lookup and resolving identifiers. 3040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3060c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 3080c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 3090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 3100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 3110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookup { 3120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 3130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek class Val { 314fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t TokenOff; 315fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t PPCondOff; 3160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek public: 318fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek Val() : TokenOff(~0) {} 319fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek Val(uint32_t toff, uint32_t poff) : TokenOff(toff), PPCondOff(poff) {} 3200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 321fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t getTokenOffset() const { 322fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek assert(TokenOff != ~((uint32_t)0) && "PTHFileLookup entry initialized."); 323fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return TokenOff; 3240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 326fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t gettPPCondOffset() const { 327fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek assert(TokenOff != ~((uint32_t)0) && "PTHFileLookup entry initialized."); 328fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return PPCondOff; 329fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek } 330fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek 331fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek bool isValid() const { return TokenOff != ~((uint32_t)0); } 3320c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek }; 3330c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3340c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekprivate: 3350c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::StringMap<Val> FileMap; 3360c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3370c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 3380c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek PTHFileLookup() {}; 3390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Val Lookup(const FileEntry* FE) { 3410c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* s = FE->getName(); 3420c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek unsigned size = strlen(s); 3430c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return FileMap.GetOrCreateValue(s, s+size).getValue(); 3440c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3450c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek void ReadTable(const char* D) { 3470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek uint32_t N = Read32(D); // Read the length of the table. 3480c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3490c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek for ( ; N > 0; --N) { // The rest of the data is the table itself. 3500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek uint32_t len = Read32(D); 3510c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* s = D; 3520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek D += len; 353fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t TokenOff = Read32(D); 354fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek FileMap.GetOrCreateValue(s, s+len).getValue() = Val(TokenOff, Read32(D)); 3550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 3580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} // end anonymous namespace 3590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 3620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3630c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3640c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 365cf58e6249c6b018508e34bcb76202caa42d2451aTed Kremenek const char* idDataTable, IdentifierInfo** perIDCache, 3666183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek Preprocessor& pp) 3676183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 3686183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek IdDataTable(idDataTable), ITable(pp.getIdentifierTable()), PP(pp) {} 3690c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3700c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 3710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 3720c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 3730e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 3740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 3750c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3760c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager* PTHManager::Create(const std::string& file, Preprocessor& PP) { 3770c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3780c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 3790c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 3800c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 3810c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3820c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!File) 3830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 3840c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 3860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 3870c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* BufBeg = File->getBufferStart(); 3880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* BufEnd = File->getBufferEnd(); 3890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if(!(BufEnd > BufBeg + sizeof(uint32_t)*3)) { 3910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 3920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 3930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the address of the index table at the end of the PTH file. 3960c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // This table contains the offset of the file lookup table, the 3970c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // persistent ID -> identifer data table. 3980c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* EndTable = BufEnd - sizeof(uint32_t)*3; 3990c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4000c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 4010c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 4020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* FileTableOffset = EndTable + sizeof(uint32_t)*2; 4030c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* FileTable = BufBeg + Read32(FileTableOffset); 4040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 4060c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 4070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4080c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(new PTHFileLookup()); 4110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek FL->ReadTable(FileTable); 4120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 4140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 4150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* IDTableOffset = EndTable + sizeof(uint32_t)*1; 4160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* IData = BufBeg + Read32(IDTableOffset); 4170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(IData > BufBeg && IData < BufEnd)) { 4180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 4190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4226183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 4236183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek uint32_t NumIds = Read32(IData); 4246183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 4256183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 4266183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 4276183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 4286183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek IdentifierInfo** PerIDCache = 4296183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek (IdentifierInfo**) calloc(NumIds, sizeof(*PerIDCache)); 4306183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 4316183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek if (!PerIDCache) { 4326183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek assert(false && "Could not allocate Persistent ID cache."); 4336183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek return 0; 4346183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 4356183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 4366183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Create the new lexer. 4376183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, PP); 4380c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4400c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekIdentifierInfo* PTHManager::ReadIdentifierInfo(const char*& D) { 4410c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Read the persistent ID from the PTH file. 4420c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek uint32_t persistentID = Read32(D); 4430c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4440c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // A persistent ID of '0' always maps to NULL. 4450c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!persistentID) 4460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4480c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Adjust the persistent ID by subtracting '1' so that it can be used 4490c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // as an index within a table in the PTH file. 4500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek --persistentID; 4510c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Check if the IdentifierInfo has already been resolved. 453cf58e6249c6b018508e34bcb76202caa42d2451aTed Kremenek IdentifierInfo*& II = PerIDCache[persistentID]; 4540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (II) return II; 4550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 4570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* TableEntry = IdDataTable + sizeof(uint32_t) * persistentID; 4580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* IDData = Buf->getBufferStart() + Read32(TableEntry); 4590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(IDData < Buf->getBufferEnd()); 4600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Read the length of the string. 4620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek uint32_t len = Read32(IDData); 4630c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4640c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the IdentifierInfo* with the specified string. 4650c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek II = &ITable.get(IDData, IDData+len); 4660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 4670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4690c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHLexer* PTHManager::CreateLexer(unsigned FileID, const FileEntry* FE) { 4700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 4720c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 4750c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 4760c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 477fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek PTHFileLookup::Val FileData = ((PTHFileLookup*) FileLookup)->Lookup(FE); 4780c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 479fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek if (!FileData.isValid()) // No tokens available. 4800c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4810c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4820c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 483fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek const char* data = Buf->getBufferStart() + FileData.getTokenOffset(); 484268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 485268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 486268ee7016a2811803989487c0ad3799486092c63Ted Kremenek const char* ppcond = Buf->getBufferStart() + FileData.gettPPCondOffset(); 487268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t len = Read32(ppcond); 488268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (len == 0) ppcond = 0; 489268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 4900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(data < Buf->getBufferEnd()); 491268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return new PTHLexer(PP, SourceLocation::getFileLoc(FileID, 0), data, ppcond, 492268ee7016a2811803989487c0ad3799486092c63Ted Kremenek *this); 4930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 494