PTHLexer.cpp revision d2f9308220af22bfc1bcd3bc2cad118dbd8be013
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 1455fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/PTHLexer.h" 150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/FileManager.h" 1610e286aa8d39fb51a21412850265d9dae74613eeChris Lattner#include "clang/Basic/FileSystemStatCache.h" 170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/IdentifierTable.h" 189378ba44b3f46d697653003c784be87746e138d2Douglas Gregor#include "clang/Basic/OnDiskHashTable.h" 1955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Basic/TokenKinds.h" 203574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar#include "clang/Lex/LexDiagnostic.h" 210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/PTHManager.h" 220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Preprocessor.h" 2355fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/Token.h" 240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/ADT/OwningPtr.h" 252596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar#include "llvm/ADT/StringExtras.h" 262596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar#include "llvm/ADT/StringMap.h" 276f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner#include "llvm/Support/MemoryBuffer.h" 283a321e23f66128dbb986343927456ff6702af617Michael J. Spencer#include "llvm/Support/system_error.h" 29274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekusing namespace clang; 309378ba44b3f46d697653003c784be87746e138d2Douglas Gregorusing namespace clang::io; 31274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 327b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek#define DISK_TOKEN_SIZE (1+1+2+4+4) 33268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 34e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 35e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// PTHLexer methods. 36e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 37e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 38da9d61c96c412f6babc7f824152609562f302388Chris LattnerPTHLexer::PTHLexer(Preprocessor &PP, FileID FID, const unsigned char *D, 39277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek const unsigned char *ppcond, PTHManager &PM) 402b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner : PreprocessorLexer(&PP, FID), TokBuf(D), CurPtr(D), LastHashTokPtr(0), 41277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek PPCond(ppcond), CurPPCondPtr(ppcond), PTHMgr(PM) { 421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 432b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileStartLoc = PP.getSourceManager().getLocForStartOfFile(FID); 445f074266cc59563036c40516c814d63825723e20Ted Kremenek} 45274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 46d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedmanbool PTHLexer::Lex(Token& Tok) { 47866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 48866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read the raw token data. 49866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Shadow CurPtr into an automatic variable. 521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char *CurPtrShadow = CurPtr; 53866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 541b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // Read in the data for the token. 555ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Word0 = ReadLE32(CurPtrShadow); 565ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t IdentifierID = ReadLE32(CurPtrShadow); 575ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t FileOffset = ReadLE32(CurPtrShadow); 581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 597b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek tok::TokenKind TKind = (tok::TokenKind) (Word0 & 0xFF); 607b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek Token::TokenFlags TFlags = (Token::TokenFlags) ((Word0 >> 8) & 0xFF); 61aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner uint32_t Len = Word0 >> 16; 627b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 63aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner CurPtr = CurPtrShadow; 641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 66866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Construct the token itself. 67866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 69866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.startToken(); 70898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setKind(TKind); 71898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setFlag(TFlags); 7259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 73a64ccefdf0ea4e03ec88805d71b0af74950c7472Argyrios Kyrtzidis Tok.setLocation(FileStartLoc.getLocWithOffset(FileOffset)); 74866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLength(Len); 7589d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 76d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner // Handle identifiers. 77277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (Tok.isLiteral()) { 78277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek Tok.setLiteralData((const char*) (PTHMgr.SpellingBase + IdentifierID)); 79277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 80277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek else if (IdentifierID) { 81d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner MIOpt.ReadToken(); 82d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner IdentifierInfo *II = PTHMgr.GetIdentifierInfo(IdentifierID-1); 831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 84d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner Tok.setIdentifierInfo(II); 851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // Change the kind of this identifier to the appropriate token kind, e.g. 87863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // turning "for" into a keyword. 88863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner Tok.setKind(II->getTokenID()); 891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 90d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (II->isHandleIdentifierCase()) 91d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return PP->HandleIdentifier(Tok); 92d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman 93d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return true; 94d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner } 951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 96866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 97866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Process the token. 98866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 99898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eof) { 100e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 101e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 1021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!ParsingPreprocessorDirective); 10459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 1051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 106d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return LexEndOfFile(Tok); 107cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 1081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 109898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::hash && Tok.isAtStartOfLine()) { 11059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 11159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 11259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek PP->HandleDirective(Tok); 1131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 114d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return false; 115e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 1161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (TKind == tok::eod) { 11859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(ParsingPreprocessorDirective); 11959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek ParsingPreprocessorDirective = false; 120d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return true; 12159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek } 122274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 12359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek MIOpt.ReadToken(); 124d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return true; 125cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 126cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 12794e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenekbool PTHLexer::LexEndOfFile(Token &Result) { 12894e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // If we hit the end of the file while parsing a preprocessor directive, 12994e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // end the preprocessor directive first. The next token returned will 13094e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // then be the end of file. 13194e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek if (ParsingPreprocessorDirective) { 13294e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek ParsingPreprocessorDirective = false; // Done parsing the "line". 13394e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek return true; // Have a token. 13494e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek } 13594e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 13694e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek assert(!LexingRawMode); 13794e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 13894e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // If we are in a #if directive, emit an error. 13994e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek while (!ConditionalStack.empty()) { 1407d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (PP->getCodeCompletionFileLoc() != FileStartLoc) 1412d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor PP->Diag(ConditionalStack.back().IfLoc, 1422d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor diag::err_pp_unterminated_conditional); 14394e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek ConditionalStack.pop_back(); 14494e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek } 14594e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 14694e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // Finally, let the preprocessor handle this. 14794e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek return PP->HandleEndOfFile(Result); 14894e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek} 14994e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 150e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 151e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 15259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenekvoid PTHLexer::getEOF(Token& Tok) { 153defb7094c835998bb821e894253287625ce8c74dTed Kremenek assert(EofToken.is(tok::eof)); 1540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 155274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 15617ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 15717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 15817ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 15917ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1604d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 161e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 162e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 163e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 1641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 16674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 16774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 168da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* p = CurPtr; 16974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 17074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 17174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 17274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 1731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 17574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 17680d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 17774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 17874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 17974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 18074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 1811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 18317ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1840c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 185268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 186268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 187268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 188268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 1891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 190da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryI = 0; 191268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 1921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 193268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 19441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 195536cebd7f81b665dbef2ad6f081dcb23349f5576Ted Kremenek uint32_t Offset = ReadLE32(CurPPCondPtr); 1961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Read the target table index from the side-table. 1985ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(CurPPCondPtr); 1991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 20141a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 20241a2660377d215d004fe413c03874bd066b5384cTed Kremenek 20341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 20441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 20541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 20641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 20741a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 20841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 20941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 21041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 211da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = 212da9d61c96c412f6babc7f824152609562f302388Chris Lattner PPCond + TableIdx*(sizeof(uint32_t)*2); 21341a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 21441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 215536cebd7f81b665dbef2ad6f081dcb23349f5576Ted Kremenek const unsigned char* HashEntryJ = TokBuf + ReadLE32(NextPPCondPtr); 2161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21741a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 2205ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(NextPPCondPtr); 22141a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 22341a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 224268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 2251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while (HashEntryI < LastHashTokPtr); 22641a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 227268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 2281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 229268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 230da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 231268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 232268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 2331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 234268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 2355ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner HashEntryI = TokBuf + ReadLE32(NextPPCondPtr); 2365ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NextIdx = ReadLE32(NextPPCondPtr); 2371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 238268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 239268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 240268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 2411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 242268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 243268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 244268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 246268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 247268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 248268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 249268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 2501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25141a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 25241a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 253268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 255e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 25741a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 2581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 259268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 260268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 261268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 262268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 26341a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 2641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 265268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 266268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 268268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 269e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 270da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(((tok::TokenKind)*CurPtr) == tok::hash); 271e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 2721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 274e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 275268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 276268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 277268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 278268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 27930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 2801b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // getSourceLocation is not on the hot path. It is used to get the location 2811b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // of the next token when transitioning back to this lexer when done 28230a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 28330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 28430a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 285b248d53f2599d8e7b53b144b713e163ca521ffcaTed Kremenek const unsigned char *OffsetPtr = CurPtr + (DISK_TOKEN_SIZE - 4); 2865ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Offset = ReadLE32(OffsetPtr); 287a64ccefdf0ea4e03ec88805d71b0af74950c7472Argyrios Kyrtzidis return FileStartLoc.getLocWithOffset(Offset); 28830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 28930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 2905f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 291d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek// PTH file lookup: map from strings to file data. 292d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek//===----------------------------------------------------------------------===// 2930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 2940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 2950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 2960c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 2970c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 29885b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHFileData { 299d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t TokenOff; 300d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t PPCondOff; 3010c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 302d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileData(uint32_t tokenOff, uint32_t ppCondOff) 303d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek : TokenOff(tokenOff), PPCondOff(ppCondOff) {} 3041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getTokenOffset() const { return TokenOff; } 3061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getPPCondOffset() const { return PPCondOff; } 307d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek}; 3081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31085b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHFileLookupCommonTrait { 3110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 312a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef std::pair<unsigned char, const char*> internal_key_type; 313a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 314a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static unsigned ComputeHash(internal_key_type x) { 3152596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar return llvm::HashString(x.second); 316d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 318d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek static std::pair<unsigned, unsigned> 319d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 320a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned keyLen = (unsigned) ReadUnalignedLE16(d); 321a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned dataLen = (unsigned) *(d++); 322a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(keyLen, dataLen); 3230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 325a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type ReadKey(const unsigned char* d, unsigned) { 326a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned char k = *(d++); // Read the entry kind. 327a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(k, (const char*) d); 328d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 329337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 33185b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHFileLookupTrait : public PTHFileLookupCommonTrait { 332337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 333337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef const FileEntry* external_key_type; 334337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHFileData data_type; 3351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 336a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const FileEntry* FE) { 337a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x1, FE->getName()); 338337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 339a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 340a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 341a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return a.first == b.first && strcmp(a.second, b.second) == 0; 3421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 3431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump static PTHFileData ReadData(const internal_key_type& k, 3451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char* d, unsigned) { 346a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek assert(k.first == 0x1 && "Only file lookups can match!"); 347d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t x = ::ReadUnalignedLE32(d); 348d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t y = ::ReadUnalignedLE32(d); 3491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return PTHFileData(x, y); 3500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3510c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 3527e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 35385b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHStringLookupTrait { 3547e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenekpublic: 3551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump typedef uint32_t 3567e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek data_type; 3577e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3587e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef const std::pair<const char*, unsigned> 3597e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek external_key_type; 3607e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3617e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef external_key_type internal_key_type; 3621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3637e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static bool EqualKey(const internal_key_type& a, 3647e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const internal_key_type& b) { 3657e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 3667e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek : false; 3677e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3697e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static unsigned ComputeHash(const internal_key_type& a) { 3705f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner return llvm::HashString(StringRef(a.first, a.second)); 3717e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3737e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // This hopefully will just get inlined and removed by the optimizer. 3747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static const internal_key_type& 3757e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek GetInternalKey(const external_key_type& x) { return x; } 3761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3777e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<unsigned, unsigned> 3787e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 3797e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((unsigned) ReadUnalignedLE16(d), sizeof(uint32_t)); 3807e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3827e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<const char*, unsigned> 3837e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKey(const unsigned char* d, unsigned n) { 3847e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(n >= 2 && d[n-1] == '\0'); 3857e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((const char*) d, n-1); 3867e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 388a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static uint32_t ReadData(const internal_key_type& k, const unsigned char* d, 389a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned) { 3907e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return ::ReadUnalignedLE32(d); 3917e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3927e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek}; 3931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end anonymous namespace 395d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek 3967e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHFileLookupTrait> PTHFileLookup; 3977e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHStringLookupTrait> PTHStringIdLookup; 3980c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3990c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4000c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 4010c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4030c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 404da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* idDataTable, 4051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IdentifierInfo** perIDCache, 4067e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek void* stringIdLookup, unsigned numIds, 40768228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* spellingBase, 40868228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const char* originalSourceFile) 4096183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 4107e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek IdDataTable(idDataTable), StringIdLookup(stringIdLookup), 41168228634016f644a1164fa1f024a9ce2093656bfTed Kremenek NumIds(numIds), PP(0), SpellingBase(spellingBase), 41268228634016f644a1164fa1f024a9ce2093656bfTed Kremenek OriginalSourceFile(originalSourceFile) {} 4130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4140c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 4150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 4160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 4177e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek delete (PTHStringIdLookup*) StringIdLookup; 4180e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 4190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 421d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikiestatic void InvalidPTH(DiagnosticsEngine &Diags, const char *Msg) { 422d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie Diags.Report(Diags.getCustomDiagID(DiagnosticsEngine::Error, Msg)); 42326555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek} 42426555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek 425d6471f7c1921c7802804ce3ff6fe9768310f72b9David BlaikiePTHManager *PTHManager::Create(const std::string &file, 426d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie DiagnosticsEngine &Diags) { 4270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 4286f42b62b6194f53bcbc349f5d17388e1936535d7Dylan Noblesmith OwningPtr<llvm::MemoryBuffer> File; 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4304eeebc464e1f968d9968a4786c82558f18ac2ed8Michael J. Spencer if (llvm::MemoryBuffer::getFile(file, File)) { 4313a321e23f66128dbb986343927456ff6702af617Michael J. Spencer // FIXME: Add ec.message() to this diag. 4323574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 4330c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4348a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek } 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4360c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 4370c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 43831ba6135375433b617a8587ea6cc836a014ebd86Roman Divacky const unsigned char *BufBeg = (const unsigned char*)File->getBufferStart(); 43931ba6135375433b617a8587ea6cc836a014ebd86Roman Divacky const unsigned char *BufEnd = (const unsigned char*)File->getBufferEnd(); 440e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek 441e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek // Check the prologue of the file. 442c141b51d78b40c7b0b04f27adfa70ec5bbddc49cRichard Smith if ((BufEnd - BufBeg) < (signed)(sizeof("cfe-pth") + 4 + 4) || 443c141b51d78b40c7b0b04f27adfa70ec5bbddc49cRichard Smith memcmp(BufBeg, "cfe-pth", sizeof("cfe-pth")) != 0) { 4443574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 445e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 44626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44867d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek // Read the PTH version. 449c141b51d78b40c7b0b04f27adfa70ec5bbddc49cRichard Smith const unsigned char *p = BufBeg + (sizeof("cfe-pth")); 45067d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek unsigned Version = ReadLE32(p); 4511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4523574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar if (Version < PTHManager::Version) { 4533574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar InvalidPTH(Diags, 4541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Version < PTHManager::Version 45526555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek ? "PTH file uses an older PTH format that is no longer supported" 45626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek : "PTH file uses a newer PTH format that cannot be read"); 45767d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek return 0; 45826555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 45967d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek 4601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Compute the address of the index table at the end of the PTH file. 461a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char *PrologueOffset = p; 4621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 463a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek if (PrologueOffset >= BufEnd) { 4643574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 465e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 46626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 4690c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 470a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* FileTableOffset = PrologueOffset + sizeof(uint32_t)*2; 4715ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* FileTable = BufBeg + ReadLE32(FileTableOffset); 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 4743574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 4750c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4760c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4786f42b62b6194f53bcbc349f5d17388e1936535d7Dylan Noblesmith OwningPtr<PTHFileLookup> FL(PTHFileLookup::Create(FileTable, BufBeg)); 4791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4801d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // Warn if the PTH file is empty. We still want to create a PTHManager 4811d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // as the PTH could be used with -include-pth. 4821d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek if (FL->isEmpty()) 4833574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar InvalidPTH(Diags, "PTH file contains no cached source data"); 4841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 4860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 487a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* IDTableOffset = PrologueOffset + sizeof(uint32_t)*0; 4885ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* IData = BufBeg + ReadLE32(IDTableOffset); 4891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 490cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(IData >= BufBeg && IData < BufEnd)) { 4913574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 49226555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 4930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4957e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Get the location of the hashtable mapping between strings and 4967e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // persistent IDs. 497a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* StringIdTableOffset = PrologueOffset + sizeof(uint32_t)*1; 4987e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const unsigned char* StringIdTable = BufBeg + ReadLE32(StringIdTableOffset); 4997e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (!(StringIdTable >= BufBeg && StringIdTable < BufEnd)) { 5003574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 50126555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 50272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 5037e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 5046f42b62b6194f53bcbc349f5d17388e1936535d7Dylan Noblesmith OwningPtr<PTHStringIdLookup> SL(PTHStringIdLookup::Create(StringIdTable, 5057e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek BufBeg)); 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 507277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek // Get the location of the spelling cache. 508a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* spellingBaseOffset = PrologueOffset + sizeof(uint32_t)*3; 509277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek const unsigned char* spellingBase = BufBeg + ReadLE32(spellingBaseOffset); 510277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (!(spellingBase >= BufBeg && spellingBase < BufEnd)) { 5113574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 512277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek return 0; 513277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 5141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5156183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 5165ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NumIds = ReadLE32(IData); 5171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 518fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner // Pre-allocate the persistent ID -> IdentifierInfo* cache. We use calloc() 5196183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 5206183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 521cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek IdentifierInfo** PerIDCache = 0; 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 523cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (NumIds) { 5241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump PerIDCache = (IdentifierInfo**)calloc(NumIds, sizeof(*PerIDCache)); 525cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!PerIDCache) { 5263574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar InvalidPTH(Diags, "Could not allocate memory for processing PTH file"); 527cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 528cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 5296183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 530cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 53168228634016f644a1164fa1f024a9ce2093656bfTed Kremenek // Compute the address of the original source file. 53268228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* originalSourceBase = PrologueOffset + sizeof(uint32_t)*4; 53368228634016f644a1164fa1f024a9ce2093656bfTed Kremenek unsigned len = ReadUnalignedLE16(originalSourceBase); 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!len) originalSourceBase = 0; 5351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Create the new PTHManager. 53772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, 53868228634016f644a1164fa1f024a9ce2093656bfTed Kremenek SL.take(), NumIds, spellingBase, 53968228634016f644a1164fa1f024a9ce2093656bfTed Kremenek (const char*) originalSourceBase); 5400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 54168228634016f644a1164fa1f024a9ce2093656bfTed Kremenek 54277ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris LattnerIdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) { 5430c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 54477ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner const unsigned char* TableEntry = IdDataTable + sizeof(uint32_t)*PersistentID; 545da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDData = 5465ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner (const unsigned char*)Buf->getBufferStart() + ReadLE32(TableEntry); 547da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(IDData < (const unsigned char*)Buf->getBufferEnd()); 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 54972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Allocate the object. 550da9d61c96c412f6babc7f824152609562f302388Chris Lattner std::pair<IdentifierInfo,const unsigned char*> *Mem = 551da9d61c96c412f6babc7f824152609562f302388Chris Lattner Alloc.Allocate<std::pair<IdentifierInfo,const unsigned char*> >(); 55272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 55372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek Mem->second = IDData; 5547e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(IDData[0] != '\0'); 555ea9c26b3dbd74a1497f5609ae6e19a85f42b6073Ted Kremenek IdentifierInfo *II = new ((void*) Mem) IdentifierInfo(); 5561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Store the new IdentifierInfo in the cache. 55877ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner PerIDCache[PersistentID] = II; 559e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar assert(II->getNameStart() && II->getNameStart()[0] != '\0'); 5600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 5610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 5620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5635f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerIdentifierInfo* PTHManager::get(StringRef Name) { 5647e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek PTHStringIdLookup& SL = *((PTHStringIdLookup*)StringIdLookup); 5657e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Double check our assumption that the last character isn't '\0'. 566681d83dd7e36ddb8a25313c446a91c00bbc652ddDavid Blaikie assert(Name.empty() || Name.back() != '\0'); 567700030ebddb987936d4fee14d9412821d96e4840Kovarththanan Rajaratnam PTHStringIdLookup::iterator I = SL.find(std::make_pair(Name.data(), 568700030ebddb987936d4fee14d9412821d96e4840Kovarththanan Rajaratnam Name.size())); 5697e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (I == SL.end()) // No identifier found? 5707e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return 0; 57172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 5727e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Match found. Return the identifier! 5737e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(*I > 0); 5747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return GetIdentifierInfo(*I-1); 5757e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek} 57672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 577f056d92e182cbe4f62c8d14102544dc38066dabcChris LattnerPTHLexer *PTHManager::CreateLexer(FileID FID) { 578f056d92e182cbe4f62c8d14102544dc38066dabcChris Lattner const FileEntry *FE = PP->getSourceManager().getFileEntryForID(FID); 5790c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 5800c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5820c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 5830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 5840c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 585d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup& PFL = *((PTHFileLookup*)FileLookup); 586d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup::iterator I = PFL.find(FE); 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 588d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek if (I == PFL.end()) // No tokens available? 5890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const PTHFileData& FileData = *I; 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 593da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *BufStart = (const unsigned char *)Buf->getBufferStart(); 5940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 595da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* data = BufStart + FileData.getTokenOffset(); 596268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 597268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 598da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* ppcond = BufStart + FileData.getPPCondOffset(); 5995ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(ppcond); 6001b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) ppcond = 0; 6011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 60272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(PP && "No preprocessor set yet!"); 6031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new PTHLexer(*PP, FID, data, ppcond, *this); 6040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 605337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 606337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 607337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek// 'stat' caching. 608337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 609337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 610337edcdbec05316b407d0d64865c88ff8597d910Ted Kremeneknamespace { 61185b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHStatData { 612337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 6130fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola const bool HasData; 6140fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola uint64_t Size; 6150fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola time_t ModTime; 6160fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola llvm::sys::fs::UniqueID UniqueID; 6170fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola bool IsDirectory; 6180fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola 6190fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola PTHStatData(uint64_t Size, time_t ModTime, llvm::sys::fs::UniqueID UniqueID, 6200fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola bool IsDirectory) 6210fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola : HasData(true), Size(Size), ModTime(ModTime), UniqueID(UniqueID), 6220fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola IsDirectory(IsDirectory) {} 6230fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola 6240fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola PTHStatData() : HasData(false) {} 625337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 62785b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHStatLookupTrait : public PTHFileLookupCommonTrait { 628337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 629a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef const char* external_key_type; // const char* 630337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHStatData data_type; 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 632a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const char *path) { 633a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // The key 'kind' doesn't matter here because it is ignored in EqualKey. 634a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x0, path); 635a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 636a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 637a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 638a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // When doing 'stat' lookups we don't care about the kind of 'a' and 'b', 639a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // just the paths. 640a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return strcmp(a.second, b.second) == 0; 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 643a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static data_type ReadData(const internal_key_type& k, const unsigned char* d, 6441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned) { 6451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 646ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (k.first /* File or Directory */) { 6470fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola bool IsDirectory = true; 6480fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola if (k.first == 0x1 /* File */) { 6490fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola IsDirectory = false; 6500fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola d += 4 * 2; // Skip the first 2 words. 6510fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola } 6520fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola 6530fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola uint64_t File = ReadUnalignedLE64(d); 6540fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola uint64_t Device = ReadUnalignedLE64(d); 6550fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola llvm::sys::fs::UniqueID UniqueID(File, Device); 6560fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola time_t ModTime = ReadUnalignedLE64(d); 6570fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola uint64_t Size = ReadUnalignedLE64(d); 6580fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola return data_type(Size, ModTime, UniqueID, IsDirectory); 659a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 660ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 661ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek // Negative stat. Don't read anything. 662a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return data_type(); 663337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 664337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 665337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 66610e286aa8d39fb51a21412850265d9dae74613eeChris Lattnerclass PTHStatCache : public FileSystemStatCache { 667337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef OnDiskChainedHashTable<PTHStatLookupTrait> CacheTy; 668337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek CacheTy Cache; 669337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 6701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumppublic: 671337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek PTHStatCache(PTHFileLookup &FL) : 672337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek Cache(FL.getNumBuckets(), FL.getNumEntries(), FL.getBuckets(), 673337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek FL.getBase()) {} 674337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 675337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek ~PTHStatCache() {} 6761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6770fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola LookupResult getStat(const char *Path, FileData &Data, bool isFile, 6780fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola int *FileDescriptor) { 679337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // Do the lookup for the file's data in the PTH file. 68010e286aa8d39fb51a21412850265d9dae74613eeChris Lattner CacheTy::iterator I = Cache.find(Path); 681337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 682337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // If we don't get a hit in the PTH file just forward to 'stat'. 683700030ebddb987936d4fee14d9412821d96e4840Kovarththanan Rajaratnam if (I == Cache.end()) 6840fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola return statChained(Path, Data, isFile, FileDescriptor); 6851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6860fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola const PTHStatData &D = *I; 6871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6880fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola if (!D.HasData) 689d6f611198089b78e32d3a15fe8bc986204aee1aaChris Lattner return CacheMissing; 690ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 6910fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola Data.Size = D.Size; 6920fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola Data.ModTime = D.ModTime; 6930fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola Data.UniqueID = D.UniqueID; 6940fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola Data.IsDirectory = D.IsDirectory; 6950fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola Data.IsNamedPipe = false; 6960fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola Data.InPCH = true; 6970fda0f75f053ad9afdb2bb8d4ea72c5e6a49d657Rafael Espindola 698d6f611198089b78e32d3a15fe8bc986204aee1aaChris Lattner return CacheExists; 699337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 700337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 701d578569d50adc6e9b1a2f91931add6b471b2378eTed Kremenek} // end anonymous namespace 702337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 70310e286aa8d39fb51a21412850265d9dae74613eeChris LattnerFileSystemStatCache *PTHManager::createStatCache() { 7045f747d187bf8dc779a4acc180f9c21f1dbf83f6aTed Kremenek return new PTHStatCache(*((PTHFileLookup*) FileLookup)); 705337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek} 706