PTHLexer.cpp revision 5ff4317536dbd7f03332bb250c8b35ec04a6f5db
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" 26274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekusing namespace clang; 27274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 287b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek#define DISK_TOKEN_SIZE (1+1+2+4+4) 29268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 30e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 31e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// Utility methods for reading from the mmap'ed PTH file. 32e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 33e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 345ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattnerstatic inline uint16_t ReadUnalignedLE16(const unsigned char *&Data) { 35da9d61c96c412f6babc7f824152609562f302388Chris Lattner uint16_t V = ((uint16_t)Data[0] << 0) | 36da9d61c96c412f6babc7f824152609562f302388Chris Lattner ((uint16_t)Data[1] << 8); 37da9d61c96c412f6babc7f824152609562f302388Chris Lattner Data += 2; 38da9d61c96c412f6babc7f824152609562f302388Chris Lattner return V; 39da9d61c96c412f6babc7f824152609562f302388Chris Lattner} 40da9d61c96c412f6babc7f824152609562f302388Chris Lattner 415ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattnerstatic inline uint32_t ReadLE32(const unsigned char *&Data) { 42f15674c680730c652a37a16a5d3f3ff429b0c308Chris Lattner// Targets that directly support unaligned little-endian 32-bit loads can just 43f15674c680730c652a37a16a5d3f3ff429b0c308Chris Lattner// use them. 44f15674c680730c652a37a16a5d3f3ff429b0c308Chris Lattner#if defined(__i386__) || defined(__x86_64__) 45f15674c680730c652a37a16a5d3f3ff429b0c308Chris Lattner uint32_t V = *((uint32_t*)Data); 46f15674c680730c652a37a16a5d3f3ff429b0c308Chris Lattner#else 47da9d61c96c412f6babc7f824152609562f302388Chris Lattner uint32_t V = ((uint32_t)Data[0] << 0) | 48da9d61c96c412f6babc7f824152609562f302388Chris Lattner ((uint32_t)Data[1] << 8) | 49da9d61c96c412f6babc7f824152609562f302388Chris Lattner ((uint32_t)Data[2] << 16) | 50da9d61c96c412f6babc7f824152609562f302388Chris Lattner ((uint32_t)Data[3] << 24); 51f15674c680730c652a37a16a5d3f3ff429b0c308Chris Lattner#endif 52da9d61c96c412f6babc7f824152609562f302388Chris Lattner Data += 4; 53e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek return V; 54e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek} 55e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 56da9d61c96c412f6babc7f824152609562f302388Chris Lattner 57e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 58e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// PTHLexer methods. 59e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 60e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 61da9d61c96c412f6babc7f824152609562f302388Chris LattnerPTHLexer::PTHLexer(Preprocessor &PP, FileID FID, const unsigned char *D, 62da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *ppcond, 632b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner PTHSpellingSearch &mySpellingSrch, PTHManager &PM) 642b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner : PreprocessorLexer(&PP, FID), TokBuf(D), CurPtr(D), LastHashTokPtr(0), 655f074266cc59563036c40516c814d63825723e20Ted Kremenek PPCond(ppcond), CurPPCondPtr(ppcond), MySpellingSrch(mySpellingSrch), 662b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner PTHMgr(PM) { 672b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 682b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileStartLoc = PP.getSourceManager().getLocForStartOfFile(FID); 695f074266cc59563036c40516c814d63825723e20Ted Kremenek} 70274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 71e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekvoid PTHLexer::Lex(Token& Tok) { 72e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted KremenekLexNextToken: 73866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 74866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 75866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read the raw token data. 76866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 77e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 78866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Shadow CurPtr into an automatic variable. 79aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner const unsigned char *CurPtrShadow = CurPtr; 80866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 811b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // Read in the data for the token. 825ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Word0 = ReadLE32(CurPtrShadow); 835ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t IdentifierID = ReadLE32(CurPtrShadow); 845ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t FileOffset = ReadLE32(CurPtrShadow); 857b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 867b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek tok::TokenKind TKind = (tok::TokenKind) (Word0 & 0xFF); 877b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek Token::TokenFlags TFlags = (Token::TokenFlags) ((Word0 >> 8) & 0xFF); 88aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner uint32_t Len = Word0 >> 16; 897b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 90aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner CurPtr = CurPtrShadow; 91e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 92866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 93866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Construct the token itself. 94866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 95e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 96866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.startToken(); 97898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setKind(TKind); 98898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setFlag(TFlags); 9959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 1002b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner Tok.setLocation(FileStartLoc.getFileLocWithOffset(FileOffset)); 101866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLength(Len); 10289d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 103d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner // Handle identifiers. 104d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (IdentifierID) { 105d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner MIOpt.ReadToken(); 106d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner IdentifierInfo *II = PTHMgr.GetIdentifierInfo(IdentifierID-1); 107d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner Tok.setIdentifierInfo(II); 108d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (II->isHandleIdentifierCase()) 109d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner PP->HandleIdentifier(Tok); 110d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner return; 111d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner } 112d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner 113866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 114866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Process the token. 115866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 1165f074266cc59563036c40516c814d63825723e20Ted Kremenek#if 0 1175f074266cc59563036c40516c814d63825723e20Ted Kremenek SourceManager& SM = PP->getSourceManager(); 1185f074266cc59563036c40516c814d63825723e20Ted Kremenek llvm::cerr << SM.getFileEntryForID(FileID)->getName() 1195f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalLineNumber(Tok.getLocation()) 1205f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalColumnNumber(Tok.getLocation()) 1215f074266cc59563036c40516c814d63825723e20Ted Kremenek << '\n'; 1225f074266cc59563036c40516c814d63825723e20Ted Kremenek#endif 12389d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 124898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eof) { 125e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 126e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 127e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 128cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 12959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 13059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!ParsingPreprocessorDirective); 13159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 13259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 13359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek // FIXME: Issue diagnostics similar to Lexer. 13459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->HandleEndOfFile(Tok, false)) 135d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 13659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 137cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek assert(PPCache && "Raw buffer::LexEndOfFile should return a token"); 138cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PPCache->Lex(Tok); 139cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 140d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 141898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::hash && Tok.isAtStartOfLine()) { 14259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 14359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 14459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek PP->HandleDirective(Tok); 145d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 14659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->isCurrentLexer(this)) 14759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek goto LexNextToken; 148e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 14959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return PP->Lex(Tok); 150e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 151e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 152898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eom) { 15359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(ParsingPreprocessorDirective); 15459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek ParsingPreprocessorDirective = false; 15559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return; 15659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek } 157274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 15859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek MIOpt.ReadToken(); 159cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 160cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 161e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 162e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 16359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenekvoid PTHLexer::getEOF(Token& Tok) { 164defb7094c835998bb821e894253287625ce8c74dTed Kremenek assert(EofToken.is(tok::eof)); 1650c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 166274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 16717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 16817ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 16917ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 17017ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1714d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 172e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 173e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 174e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 175e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 17674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 17774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 17874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 179da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* p = CurPtr; 18074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 18174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 18274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 18374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 184e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 18574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 18674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 18780d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 18874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 18974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 19074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 19174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 19274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 19374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 19417ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 196268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 197268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 198268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 199268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 200268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 201da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryI = 0; 202268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t Offset; 203268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 204268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 205268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 20641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 2075ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Offset = ReadLE32(CurPPCondPtr); 20841a2660377d215d004fe413c03874bd066b5384cTed Kremenek 20941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the target table index from the side-table. 2105ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(CurPPCondPtr); 21141a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 21341a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 21441a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 21641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 21741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 22041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 22141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 223da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = 224da9d61c96c412f6babc7f824152609562f302388Chris Lattner PPCond + TableIdx*(sizeof(uint32_t)*2); 22541a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 22641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 2275ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TmpOffset = ReadLE32(NextPPCondPtr); 228da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryJ = TokBuf + TmpOffset; 22941a2660377d215d004fe413c03874bd066b5384cTed Kremenek 23041a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 23141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 23241a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 23341a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 2345ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(NextPPCondPtr); 23541a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 23641a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 23741a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 238268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 23941a2660377d215d004fe413c03874bd066b5384cTed Kremenek while (HashEntryI < LastHashTokPtr); 24041a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 241268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 242268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 243268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 244da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 246268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 247268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 248268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 2495ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner HashEntryI = TokBuf + ReadLE32(NextPPCondPtr); 2505ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NextIdx = ReadLE32(NextPPCondPtr); 251268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 252268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 253268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 258268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 259268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 260268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 261268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 262268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 263268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 26541a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 26641a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 268268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 269e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 270268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 27141a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 272268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 274268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 275268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 276268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 27741a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 278268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 279268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 280268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 281268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 282268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 283e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 284da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(((tok::TokenKind)*CurPtr) == tok::hash); 285e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 286e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 287268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 288e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 289268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 290268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 291268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 292268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 29330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 2941b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // getSourceLocation is not on the hot path. It is used to get the location 2951b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // of the next token when transitioning back to this lexer when done 29630a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 29730a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 29830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 299b248d53f2599d8e7b53b144b713e163ca521ffcaTed Kremenek const unsigned char *OffsetPtr = CurPtr + (DISK_TOKEN_SIZE - 4); 3005ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Offset = ReadLE32(OffsetPtr); 3011b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return FileStartLoc.getFileLocWithOffset(Offset); 30230a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 30330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 3045f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 3055f074266cc59563036c40516c814d63825723e20Ted Kremenek// getSpelling() - Use cached data in PTH files for getSpelling(). 3065f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 3075f074266cc59563036c40516c814d63825723e20Ted Kremenek 3082b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHManager::getSpelling(FileID FID, unsigned FPos, 3092b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner const char *&Buffer) { 3102b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner llvm::DenseMap<FileID, PTHSpellingSearch*>::iterator I =SpellingMap.find(FID); 3115f074266cc59563036c40516c814d63825723e20Ted Kremenek 3125f074266cc59563036c40516c814d63825723e20Ted Kremenek if (I == SpellingMap.end()) 3131b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return 0; 314f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 3152b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return I->second->getSpellingBinarySearch(FPos, Buffer); 3162b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner} 3172b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 3182b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHManager::getSpelling(SourceLocation Loc, const char *&Buffer) { 3196b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner SourceManager &SM = PP->getSourceManager(); 3206b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner Loc = SM.getSpellingLoc(Loc); 3216b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner std::pair<FileID, unsigned> LocInfo = SM.getDecomposedFileLoc(Loc); 3222b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return getSpelling(LocInfo.first, LocInfo.second, Buffer); 3235f074266cc59563036c40516c814d63825723e20Ted Kremenek} 3245f074266cc59563036c40516c814d63825723e20Ted Kremenek 3255f074266cc59563036c40516c814d63825723e20Ted Kremenekunsigned PTHManager::getSpellingAtPTHOffset(unsigned PTHOffset, 326da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char *&Buffer) { 3271b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(PTHOffset < Buf->getBufferSize()); 3281b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char* Ptr = 3291b5285e1ba31975864da356b2ed927e87670e654Chris Lattner (const unsigned char*)Buf->getBufferStart() + PTHOffset; 33032a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 33132a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // The string is prefixed by 16 bits for its length, followed by the string 33232a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // itself. 3335ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Len = ReadUnalignedLE16(Ptr); 3341b5285e1ba31975864da356b2ed927e87670e654Chris Lattner Buffer = (const char *)Ptr; 3351b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return Len; 33632a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek} 33732a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3381b5285e1ba31975864da356b2ed927e87670e654Chris Lattnerunsigned PTHSpellingSearch::getSpellingLinearSearch(unsigned FPos, 3395f074266cc59563036c40516c814d63825723e20Ted Kremenek const char *&Buffer) { 3401b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = LinearItr; 3411b5285e1ba31975864da356b2ed927e87670e654Chris Lattner unsigned Len = 0; 3425f074266cc59563036c40516c814d63825723e20Ted Kremenek 3431b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Ptr == TableEnd) 3441b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return getSpellingBinarySearch(FPos, Buffer); 3455f074266cc59563036c40516c814d63825723e20Ted Kremenek 3465f074266cc59563036c40516c814d63825723e20Ted Kremenek do { 3475ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokOffset = ReadLE32(Ptr); 34832a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3491b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset > FPos) 3501b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return getSpellingBinarySearch(FPos, Buffer); 35132a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 35232a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // Did we find a matching token offset for this spelling? 3531b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset == FPos) { 3545ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingPTHOffset = ReadLE32(Ptr); 3551b5285e1ba31975864da356b2ed927e87670e654Chris Lattner Len = PTHMgr.getSpellingAtPTHOffset(SpellingPTHOffset, Buffer); 35632a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek break; 35732a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek } 3581b5285e1ba31975864da356b2ed927e87670e654Chris Lattner } while (Ptr != TableEnd); 35932a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3601b5285e1ba31975864da356b2ed927e87670e654Chris Lattner LinearItr = Ptr; 3611b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return Len; 362b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek} 363b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 364da9d61c96c412f6babc7f824152609562f302388Chris Lattner 3651b5285e1ba31975864da356b2ed927e87670e654Chris Lattnerunsigned PTHSpellingSearch::getSpellingBinarySearch(unsigned FPos, 366da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char *&Buffer) { 3675f074266cc59563036c40516c814d63825723e20Ted Kremenek 368f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek assert((TableEnd - TableBeg) % SpellingEntrySize == 0); 3691b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(TableEnd >= TableBeg); 370f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 371f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek if (TableEnd == TableBeg) 372f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek return 0; 373f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 3745f074266cc59563036c40516c814d63825723e20Ted Kremenek unsigned min = 0; 3751b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *tb = TableBeg; 376f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek unsigned max = NumSpellings; 3775f074266cc59563036c40516c814d63825723e20Ted Kremenek 378f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek do { 3795f074266cc59563036c40516c814d63825723e20Ted Kremenek unsigned i = (max - min) / 2 + min; 3801b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = tb + (i * SpellingEntrySize); 3815f074266cc59563036c40516c814d63825723e20Ted Kremenek 3825ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokOffset = ReadLE32(Ptr); 3831b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset > FPos) { 3845f074266cc59563036c40516c814d63825723e20Ted Kremenek max = i; 385f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek assert(!(max == min) || (min == i)); 3865f074266cc59563036c40516c814d63825723e20Ted Kremenek continue; 3875f074266cc59563036c40516c814d63825723e20Ted Kremenek } 3885f074266cc59563036c40516c814d63825723e20Ted Kremenek 3891b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset < FPos) { 3907bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek if (i == min) 3917bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek break; 3927bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek 3935f074266cc59563036c40516c814d63825723e20Ted Kremenek min = i; 3945f074266cc59563036c40516c814d63825723e20Ted Kremenek continue; 3955f074266cc59563036c40516c814d63825723e20Ted Kremenek } 3965f074266cc59563036c40516c814d63825723e20Ted Kremenek 3975ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingPTHOffset = ReadLE32(Ptr); 3985f074266cc59563036c40516c814d63825723e20Ted Kremenek return PTHMgr.getSpellingAtPTHOffset(SpellingPTHOffset, Buffer); 3995f074266cc59563036c40516c814d63825723e20Ted Kremenek } 400f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek while (min != max); 4015f074266cc59563036c40516c814d63825723e20Ted Kremenek 4025f074266cc59563036c40516c814d63825723e20Ted Kremenek return 0; 4035f074266cc59563036c40516c814d63825723e20Ted Kremenek} 4045f074266cc59563036c40516c814d63825723e20Ted Kremenek 4052b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHLexer::getSpelling(SourceLocation Loc, const char *&Buffer) { 4062b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner SourceManager &SM = PP->getSourceManager(); 4072b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner Loc = SM.getSpellingLoc(Loc); 4082b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner std::pair<FileID, unsigned> LocInfo = SM.getDecomposedFileLoc(Loc); 4092b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 4102b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = LocInfo.first; 4112b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner unsigned FPos = LocInfo.second; 4125f074266cc59563036c40516c814d63825723e20Ted Kremenek 4132b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner if (FID == getFileID()) 4142b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return MySpellingSrch.getSpellingLinearSearch(FPos, Buffer); 4152b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return PTHMgr.getSpelling(FID, FPos, Buffer); 4165f074266cc59563036c40516c814d63825723e20Ted Kremenek} 4175f074266cc59563036c40516c814d63825723e20Ted Kremenek 4180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// Internal Data Structures for PTH file lookup and resolving identifiers. 4200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 4240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 4250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 4260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 4270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookup { 4280c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 4290c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek class Val { 430fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t TokenOff; 431fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t PPCondOff; 432b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t SpellingOff; 4330c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek public: 434fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek Val() : TokenOff(~0) {} 435b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek Val(uint32_t toff, uint32_t poff, uint32_t soff) 436b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek : TokenOff(toff), PPCondOff(poff), SpellingOff(soff) {} 4370c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4381b5285e1ba31975864da356b2ed927e87670e654Chris Lattner bool isValid() const { return TokenOff != ~((uint32_t)0); } 4391b5285e1ba31975864da356b2ed927e87670e654Chris Lattner 440fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t getTokenOffset() const { 4411b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 442fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return TokenOff; 4430c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4440c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 445b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t getPPCondOffset() const { 4461b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 447fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return PPCondOff; 448fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek } 449fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek 450b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t getSpellingOffset() const { 4511b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 452b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek return SpellingOff; 453b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek } 4540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek }; 4550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekprivate: 4570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::StringMap<Val> FileMap; 4580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 4600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek PTHFileLookup() {}; 4610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 462cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek bool isEmpty() const { 463cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return FileMap.empty(); 464cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 465cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 4660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Val Lookup(const FileEntry* FE) { 4670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* s = FE->getName(); 4680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek unsigned size = strlen(s); 4690c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return FileMap.GetOrCreateValue(s, s+size).getValue(); 4700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 472da9d61c96c412f6babc7f824152609562f302388Chris Lattner void ReadTable(const unsigned char* D) { 4735ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t N = ReadLE32(D); // Read the length of the table. 4740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4750c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek for ( ; N > 0; --N) { // The rest of the data is the table itself. 4765ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(D); 477da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char* s = (const char *)D; 4781b5285e1ba31975864da356b2ed927e87670e654Chris Lattner D += Len; 479b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 4805ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokenOff = ReadLE32(D); 4815ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t PPCondOff = ReadLE32(D); 4825ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingOff = ReadLE32(D); 483b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 4841b5285e1ba31975864da356b2ed927e87670e654Chris Lattner FileMap.GetOrCreateValue(s, s+Len).getValue() = 485b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek Val(TokenOff, PPCondOff, SpellingOff); 4860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4870c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 4890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} // end anonymous namespace 4900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 4930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4950c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 496da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* idDataTable, 497da9d61c96c412f6babc7f824152609562f302388Chris Lattner IdentifierInfo** perIDCache, 498da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* sortedIdTable, unsigned numIds) 4996183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 50072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IdDataTable(idDataTable), SortedIdTable(sortedIdTable), 50172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek NumIds(numIds), PP(0) {} 5020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5030c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 5040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 5050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 5060e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 5070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 5080c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 50972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekPTHManager* PTHManager::Create(const std::string& file) { 5100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 5110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 5120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 5130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!File) 5150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 5180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 519da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufBeg = (unsigned char*)File->getBufferStart(); 520da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufEnd = (unsigned char*)File->getBufferEnd(); 5210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if(!(BufEnd > BufBeg + sizeof(uint32_t)*3)) { 5230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the address of the index table at the end of the PTH file. 5280c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // This table contains the offset of the file lookup table, the 5290c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // persistent ID -> identifer data table. 530293b4af04ca37576d4b228adf09acd6cee3ddb16Ted Kremenek // FIXME: We should just embed this offset in the PTH file. 531da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* EndTable = BufEnd - sizeof(uint32_t)*4; 5320c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5330c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 5340c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 535da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* FileTableOffset = EndTable + sizeof(uint32_t)*3; 5365ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* FileTable = BufBeg + ReadLE32(FileTableOffset); 5370c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5380c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 5390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5410c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5420c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5430c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(new PTHFileLookup()); 5440c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek FL->ReadTable(FileTable); 545cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 546cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (FL->isEmpty()) 547cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 5480c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5490c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 5500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 551da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDTableOffset = EndTable + sizeof(uint32_t)*1; 5525ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* IData = BufBeg + ReadLE32(IDTableOffset); 553cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 554cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(IData >= BufBeg && IData < BufEnd)) { 5550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 55972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Get the location of the lexigraphically-sorted table of persistent IDs. 560da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* SortedIdTableOffset = EndTable + sizeof(uint32_t)*2; 5615ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* SortedIdTable = BufBeg + ReadLE32(SortedIdTableOffset); 562cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(SortedIdTable >= BufBeg && SortedIdTable < BufEnd)) { 56372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(false && "Invalid PTH file."); 56472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return 0; // FIXME: Proper error diagnostic? 56572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 56672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 5676183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 5685ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NumIds = ReadLE32(IData); 569cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 5706183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 5716183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 5726183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 573cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek IdentifierInfo** PerIDCache = 0; 5746183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 575cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (NumIds) { 576cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek PerIDCache = (IdentifierInfo**)calloc(NumIds, sizeof(*PerIDCache)); 577cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!PerIDCache) { 578cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek assert(false && "Could not allocate Persistent ID cache."); 579cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 580cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 5816183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 582cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 58372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Create the new PTHManager. 58472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, 58572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek SortedIdTable, NumIds); 5860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 58777ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris LattnerIdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) { 5880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 58977ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner const unsigned char* TableEntry = IdDataTable + sizeof(uint32_t)*PersistentID; 590da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDData = 5915ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner (const unsigned char*)Buf->getBufferStart() + ReadLE32(TableEntry); 592da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(IDData < (const unsigned char*)Buf->getBufferEnd()); 5930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 59472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Allocate the object. 595da9d61c96c412f6babc7f824152609562f302388Chris Lattner std::pair<IdentifierInfo,const unsigned char*> *Mem = 596da9d61c96c412f6babc7f824152609562f302388Chris Lattner Alloc.Allocate<std::pair<IdentifierInfo,const unsigned char*> >(); 59772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 59872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek Mem->second = IDData; 599ea9c26b3dbd74a1497f5609ae6e19a85f42b6073Ted Kremenek IdentifierInfo *II = new ((void*) Mem) IdentifierInfo(); 6000c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 60172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Store the new IdentifierInfo in the cache. 60277ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner PerIDCache[PersistentID] = II; 6030c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 6040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 6050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 60672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekIdentifierInfo* PTHManager::get(const char *NameStart, const char *NameEnd) { 60772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned min = 0; 60872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned max = NumIds; 6091b5285e1ba31975864da356b2ed927e87670e654Chris Lattner unsigned Len = NameEnd - NameStart; 61072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 61172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek do { 61272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned i = (max - min) / 2 + min; 6131b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = SortedIdTable + (i * 4); 61472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 61572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Read the persistentID. 6165ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned perID = ReadLE32(Ptr); 61772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 61872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Get the IdentifierInfo. 61972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IdentifierInfo* II = GetIdentifierInfo(perID); 62072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 62172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // First compare the lengths. 62272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned IILen = II->getLength(); 6231b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len < IILen) goto IsLess; 6241b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len > IILen) goto IsGreater; 62572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 62672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Now compare the strings! 62772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek { 6281b5285e1ba31975864da356b2ed927e87670e654Chris Lattner signed comp = strncmp(NameStart, II->getName(), Len); 62972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (comp < 0) goto IsLess; 63072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (comp > 0) goto IsGreater; 63172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 63272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // We found a match! 63372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return II; 63472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 63572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IsGreater: 63672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (i == min) break; 63772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek min = i; 63872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek continue; 63972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 64072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IsLess: 64172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek max = i; 64272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(!(max == min) || (min == i)); 64372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 644e1deaac73379eeb9864215c7979f6005ebd74cefTed Kremenek while (min != max); 64572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 64672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return 0; 64772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek} 64872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 64972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 650f056d92e182cbe4f62c8d14102544dc38066dabcChris LattnerPTHLexer *PTHManager::CreateLexer(FileID FID) { 651f056d92e182cbe4f62c8d14102544dc38066dabcChris Lattner const FileEntry *FE = PP->getSourceManager().getFileEntryForID(FID); 6520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 6530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 6540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 6550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 6560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 6570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 6582b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner PTHFileLookup::Val FileData = ((PTHFileLookup*)FileLookup)->Lookup(FE); 6590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 660fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek if (!FileData.isValid()) // No tokens available. 6610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 6620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 663da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *BufStart = (const unsigned char *)Buf->getBufferStart(); 6640c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 665da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* data = BufStart + FileData.getTokenOffset(); 666268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 667268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 668da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* ppcond = BufStart + FileData.getPPCondOffset(); 6695ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(ppcond); 6701b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) ppcond = 0; 67132a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 67232a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // Get the location of the spelling table. 673da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* spellingTable = BufStart + FileData.getSpellingOffset(); 67432a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 6755ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Len = ReadLE32(spellingTable); 6761b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) spellingTable = 0; 677b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 678da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(data < (const unsigned char*)Buf->getBufferEnd()); 6795f074266cc59563036c40516c814d63825723e20Ted Kremenek 6805f074266cc59563036c40516c814d63825723e20Ted Kremenek // Create the SpellingSearch object for this FileID. 6811b5285e1ba31975864da356b2ed927e87670e654Chris Lattner PTHSpellingSearch* ss = new PTHSpellingSearch(*this, Len, spellingTable); 6822b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner SpellingMap[FID] = ss; 6835f074266cc59563036c40516c814d63825723e20Ted Kremenek 68472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(PP && "No preprocessor set yet!"); 6852b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return new PTHLexer(*PP, FID, data, ppcond, *ss, *this); 6860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 687