PTHLexer.cpp revision 94e3d1f0349634235606be77c08b3a48a6d563d6
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" 179378ba44b3f46d697653003c784be87746e138d2Douglas Gregor#include "clang/Basic/OnDiskHashTable.h" 183574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar#include "clang/Lex/LexDiagnostic.h" 19274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/PTHLexer.h" 20274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/Preprocessor.h" 210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/PTHManager.h" 220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Token.h" 230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Preprocessor.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" 28337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek#include <sys/stat.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 46e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekvoid PTHLexer::Lex(Token& Tok) { 47e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted KremenekLexNextToken: 48866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 49866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 50866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read the raw token data. 51866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Shadow CurPtr into an automatic variable. 541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char *CurPtrShadow = CurPtr; 55866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 561b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // Read in the data for the token. 575ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Word0 = ReadLE32(CurPtrShadow); 585ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t IdentifierID = ReadLE32(CurPtrShadow); 595ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t FileOffset = ReadLE32(CurPtrShadow); 601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 617b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek tok::TokenKind TKind = (tok::TokenKind) (Word0 & 0xFF); 627b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek Token::TokenFlags TFlags = (Token::TokenFlags) ((Word0 >> 8) & 0xFF); 63aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner uint32_t Len = Word0 >> 16; 647b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 65aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner CurPtr = CurPtrShadow; 661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 67866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 68866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Construct the token itself. 69866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.startToken(); 72898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setKind(TKind); 73898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setFlag(TFlags); 7459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 752b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner Tok.setLocation(FileStartLoc.getFileLocWithOffset(FileOffset)); 76866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLength(Len); 7789d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 78d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner // Handle identifiers. 79277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (Tok.isLiteral()) { 80277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek Tok.setLiteralData((const char*) (PTHMgr.SpellingBase + IdentifierID)); 81277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 82277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek else if (IdentifierID) { 83d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner MIOpt.ReadToken(); 84d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner IdentifierInfo *II = PTHMgr.GetIdentifierInfo(IdentifierID-1); 851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner Tok.setIdentifierInfo(II); 871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // Change the kind of this identifier to the appropriate token kind, e.g. 89863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // turning "for" into a keyword. 90863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner Tok.setKind(II->getTokenID()); 911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 92d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (II->isHandleIdentifierCase()) 93d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner PP->HandleIdentifier(Tok); 94d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner return; 95d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner } 961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 97866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 98866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Process the token. 99866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 100898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eof) { 101e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 102e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 1031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10494e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // Save 'PP' to 'PPCache' as LexEndOfFile can delete 'this'. 105cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 1061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!ParsingPreprocessorDirective); 10859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 10994e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 11094e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek if (LexEndOfFile(Tok)) 111d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 1121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 113cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PPCache->Lex(Tok); 114cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 1151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::hash && Tok.isAtStartOfLine()) { 11759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 11859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 11959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek PP->HandleDirective(Tok); 1201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->isCurrentLexer(this)) 12259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek goto LexNextToken; 1231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return PP->Lex(Tok); 125e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 1261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 127898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eom) { 12859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(ParsingPreprocessorDirective); 12959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek ParsingPreprocessorDirective = false; 13059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return; 13159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek } 132274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 13359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek MIOpt.ReadToken(); 134cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 135cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 13694e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenekbool PTHLexer::LexEndOfFile(Token &Result) { 13794e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // If we hit the end of the file while parsing a preprocessor directive, 13894e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // end the preprocessor directive first. The next token returned will 13994e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // then be the end of file. 14094e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek if (ParsingPreprocessorDirective) { 14194e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek ParsingPreprocessorDirective = false; // Done parsing the "line". 14294e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek return true; // Have a token. 14394e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek } 14494e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 14594e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek assert(!LexingRawMode); 14694e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 14794e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // If we are in a #if directive, emit an error. 14894e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek while (!ConditionalStack.empty()) { 14994e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek PP->Diag(ConditionalStack.back().IfLoc, 15094e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek diag::err_pp_unterminated_conditional); 15194e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek ConditionalStack.pop_back(); 15294e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek } 15394e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 15494e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek // Finally, let the preprocessor handle this. 15594e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek return PP->HandleEndOfFile(Result); 15694e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek} 15794e3d1f0349634235606be77c08b3a48a6d563d6Ted Kremenek 158e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 159e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 16059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenekvoid PTHLexer::getEOF(Token& Tok) { 161defb7094c835998bb821e894253287625ce8c74dTed Kremenek assert(EofToken.is(tok::eof)); 1620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 163274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 16417ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 16517ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 16617ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 16717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1684d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 169e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 170e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 171e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 1721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 17474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 17574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 176da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* p = CurPtr; 17774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 17874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 17974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 18074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 1811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 18374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 18480d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 18574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 18674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 18774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 18874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 1891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 19117ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 193268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 194268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 195268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 196268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 1971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 198da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryI = 0; 1991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t Offset; 200268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 2011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 202268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 20341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 2045ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Offset = ReadLE32(CurPPCondPtr); 2051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Read the target table index from the side-table. 2075ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(CurPPCondPtr); 2081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 21041a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 21141a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 21341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 21441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 21541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 21641a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 21741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 220da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = 221da9d61c96c412f6babc7f824152609562f302388Chris Lattner PPCond + TableIdx*(sizeof(uint32_t)*2); 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 22341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 2245ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TmpOffset = ReadLE32(NextPPCondPtr); 225da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryJ = TokBuf + TmpOffset; 2261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22741a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 22841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 22941a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 23041a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 2315ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(NextPPCondPtr); 23241a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 23341a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 23441a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 235268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 2361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while (HashEntryI < LastHashTokPtr); 23741a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 238268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 2391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 240268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 241da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 242268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 243268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 2441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 2465ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner HashEntryI = TokBuf + ReadLE32(NextPPCondPtr); 2475ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NextIdx = ReadLE32(NextPPCondPtr); 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 249268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 250268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 251268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 2521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 253268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 258268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 259268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 260268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26241a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 26341a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 265268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 266e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 26841a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 2691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 270268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 271268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 272268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 27441a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 2751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 276268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 277268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 278268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 279268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 280e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 281da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(((tok::TokenKind)*CurPtr) == tok::hash); 282e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 2831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 284268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 285e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 286268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 287268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 288268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 289268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 29030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 2911b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // getSourceLocation is not on the hot path. It is used to get the location 2921b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // of the next token when transitioning back to this lexer when done 29330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 29430a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 29530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 296b248d53f2599d8e7b53b144b713e163ca521ffcaTed Kremenek const unsigned char *OffsetPtr = CurPtr + (DISK_TOKEN_SIZE - 4); 2975ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Offset = ReadLE32(OffsetPtr); 2981b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return FileStartLoc.getFileLocWithOffset(Offset); 29930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 30030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 3015f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 302d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek// PTH file lookup: map from strings to file data. 303d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek//===----------------------------------------------------------------------===// 3040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 3060c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 3070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 3080c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 30985b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHFileData { 310d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t TokenOff; 311d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t PPCondOff; 3120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 313d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileData(uint32_t tokenOff, uint32_t ppCondOff) 314d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek : TokenOff(tokenOff), PPCondOff(ppCondOff) {} 3151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getTokenOffset() const { return TokenOff; } 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getPPCondOffset() const { return PPCondOff; } 318d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek}; 3191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32185b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHFileLookupCommonTrait { 3220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 323a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef std::pair<unsigned char, const char*> internal_key_type; 324a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 325a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static unsigned ComputeHash(internal_key_type x) { 3262596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar return llvm::HashString(x.second); 327d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 3281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 329d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek static std::pair<unsigned, unsigned> 330d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 331a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned keyLen = (unsigned) ReadUnalignedLE16(d); 332a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned dataLen = (unsigned) *(d++); 333a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(keyLen, dataLen); 3340c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 336a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type ReadKey(const unsigned char* d, unsigned) { 337a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned char k = *(d++); // Read the entry kind. 338a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(k, (const char*) d); 339d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 340337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 3411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 34285b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHFileLookupTrait : public PTHFileLookupCommonTrait { 343337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 344337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef const FileEntry* external_key_type; 345337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHFileData data_type; 3461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 347a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const FileEntry* FE) { 348a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x1, FE->getName()); 349337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 350a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 351a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 352a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return a.first == b.first && strcmp(a.second, b.second) == 0; 3531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 3541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump static PTHFileData ReadData(const internal_key_type& k, 3561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char* d, unsigned) { 357a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek assert(k.first == 0x1 && "Only file lookups can match!"); 358d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t x = ::ReadUnalignedLE32(d); 359d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t y = ::ReadUnalignedLE32(d); 3601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return PTHFileData(x, y); 3610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 3637e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 36485b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHStringLookupTrait { 3657e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenekpublic: 3661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump typedef uint32_t 3677e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek data_type; 3687e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3697e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef const std::pair<const char*, unsigned> 3707e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek external_key_type; 3717e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3727e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef external_key_type internal_key_type; 3731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static bool EqualKey(const internal_key_type& a, 3757e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const internal_key_type& b) { 3767e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 3777e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek : false; 3787e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3807e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static unsigned ComputeHash(const internal_key_type& a) { 3812596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar return llvm::HashString(llvm::StringRef(a.first, a.second)); 3827e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3847e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // This hopefully will just get inlined and removed by the optimizer. 3857e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static const internal_key_type& 3867e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek GetInternalKey(const external_key_type& x) { return x; } 3871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3887e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<unsigned, unsigned> 3897e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 3907e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((unsigned) ReadUnalignedLE16(d), sizeof(uint32_t)); 3917e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3937e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<const char*, unsigned> 3947e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKey(const unsigned char* d, unsigned n) { 3957e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(n >= 2 && d[n-1] == '\0'); 3967e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((const char*) d, n-1); 3977e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 399a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static uint32_t ReadData(const internal_key_type& k, const unsigned char* d, 400a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned) { 4017e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return ::ReadUnalignedLE32(d); 4027e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 4037e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek}; 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end anonymous namespace 406d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek 4077e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHFileLookupTrait> PTHFileLookup; 4087e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHStringLookupTrait> PTHStringIdLookup; 4090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 4120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4140c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 415da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* idDataTable, 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IdentifierInfo** perIDCache, 4177e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek void* stringIdLookup, unsigned numIds, 41868228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* spellingBase, 41968228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const char* originalSourceFile) 4206183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 4217e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek IdDataTable(idDataTable), StringIdLookup(stringIdLookup), 42268228634016f644a1164fa1f024a9ce2093656bfTed Kremenek NumIds(numIds), PP(0), SpellingBase(spellingBase), 42368228634016f644a1164fa1f024a9ce2093656bfTed Kremenek OriginalSourceFile(originalSourceFile) {} 4240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4250c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 4260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 4270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 4287e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek delete (PTHStringIdLookup*) StringIdLookup; 4290e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 4300c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4310c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4323574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbarstatic void InvalidPTH(Diagnostic &Diags, const char *Msg) { 4333574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(Diags.getCustomDiagID(Diagnostic::Error, Msg)); 43426555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek} 43526555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek 4363574f46cf495ec61618fd6864b045c5b1d0d5068Daniel DunbarPTHManager* PTHManager::Create(const std::string& file, Diagnostic &Diags) { 4370c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 4380c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 4390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 4401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4418a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek if (!File) { 4423574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 4430c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4448a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek } 4451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 4470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 448da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufBeg = (unsigned char*)File->getBufferStart(); 449da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufEnd = (unsigned char*)File->getBufferEnd(); 450e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek 451e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek // Check the prologue of the file. 4524adc71ae2cfc190f8d2cf58876e2a7893aa74ee0Ted Kremenek if ((BufEnd - BufBeg) < (signed) (sizeof("cfe-pth") + 3 + 4) || 45326555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek memcmp(BufBeg, "cfe-pth", sizeof("cfe-pth") - 1) != 0) { 4543574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 455e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 45626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45867d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek // Read the PTH version. 459e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek const unsigned char *p = BufBeg + (sizeof("cfe-pth") - 1); 46067d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek unsigned Version = ReadLE32(p); 4611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4623574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar if (Version < PTHManager::Version) { 4633574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar InvalidPTH(Diags, 4641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Version < PTHManager::Version 46526555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek ? "PTH file uses an older PTH format that is no longer supported" 46626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek : "PTH file uses a newer PTH format that cannot be read"); 46767d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek return 0; 46826555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 46967d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek 4701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Compute the address of the index table at the end of the PTH file. 471a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char *PrologueOffset = p; 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 473a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek if (PrologueOffset >= BufEnd) { 4743574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 475e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 47626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4780c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 4790c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 480a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* FileTableOffset = PrologueOffset + sizeof(uint32_t)*2; 4815ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* FileTable = BufBeg + ReadLE32(FileTableOffset); 4821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 4843574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 4850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 488d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(PTHFileLookup::Create(FileTable, BufBeg)); 4891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4901d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // Warn if the PTH file is empty. We still want to create a PTHManager 4911d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // as the PTH could be used with -include-pth. 4921d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek if (FL->isEmpty()) 4933574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar InvalidPTH(Diags, "PTH file contains no cached source data"); 4941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 4960c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 497a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* IDTableOffset = PrologueOffset + sizeof(uint32_t)*0; 4985ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* IData = BufBeg + ReadLE32(IDTableOffset); 4991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 500cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(IData >= BufBeg && IData < BufEnd)) { 5013574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 50226555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 5030c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5057e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Get the location of the hashtable mapping between strings and 5067e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // persistent IDs. 507a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* StringIdTableOffset = PrologueOffset + sizeof(uint32_t)*1; 5087e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const unsigned char* StringIdTable = BufBeg + ReadLE32(StringIdTableOffset); 5097e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (!(StringIdTable >= BufBeg && StringIdTable < BufEnd)) { 5103574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 51126555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 51272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 5137e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 5147e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek llvm::OwningPtr<PTHStringIdLookup> SL(PTHStringIdLookup::Create(StringIdTable, 5157e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek BufBeg)); 5161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 517277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek // Get the location of the spelling cache. 518a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* spellingBaseOffset = PrologueOffset + sizeof(uint32_t)*3; 519277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek const unsigned char* spellingBase = BufBeg + ReadLE32(spellingBaseOffset); 520277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (!(spellingBase >= BufBeg && spellingBase < BufEnd)) { 5213574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar Diags.Report(diag::err_invalid_pth_file) << file; 522277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek return 0; 523277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 5241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5256183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 5265ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NumIds = ReadLE32(IData); 5271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5286183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 5296183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 5306183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 531cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek IdentifierInfo** PerIDCache = 0; 5321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 533cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (NumIds) { 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump PerIDCache = (IdentifierInfo**)calloc(NumIds, sizeof(*PerIDCache)); 535cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!PerIDCache) { 5363574f46cf495ec61618fd6864b045c5b1d0d5068Daniel Dunbar InvalidPTH(Diags, "Could not allocate memory for processing PTH file"); 537cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 538cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 5396183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 540cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 54168228634016f644a1164fa1f024a9ce2093656bfTed Kremenek // Compute the address of the original source file. 54268228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* originalSourceBase = PrologueOffset + sizeof(uint32_t)*4; 54368228634016f644a1164fa1f024a9ce2093656bfTed Kremenek unsigned len = ReadUnalignedLE16(originalSourceBase); 5441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!len) originalSourceBase = 0; 5451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 54672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Create the new PTHManager. 54772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, 54868228634016f644a1164fa1f024a9ce2093656bfTed Kremenek SL.take(), NumIds, spellingBase, 54968228634016f644a1164fa1f024a9ce2093656bfTed Kremenek (const char*) originalSourceBase); 5500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 55168228634016f644a1164fa1f024a9ce2093656bfTed Kremenek 55277ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris LattnerIdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) { 5530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 55477ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner const unsigned char* TableEntry = IdDataTable + sizeof(uint32_t)*PersistentID; 555da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDData = 5565ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner (const unsigned char*)Buf->getBufferStart() + ReadLE32(TableEntry); 557da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(IDData < (const unsigned char*)Buf->getBufferEnd()); 5581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Allocate the object. 560da9d61c96c412f6babc7f824152609562f302388Chris Lattner std::pair<IdentifierInfo,const unsigned char*> *Mem = 561da9d61c96c412f6babc7f824152609562f302388Chris Lattner Alloc.Allocate<std::pair<IdentifierInfo,const unsigned char*> >(); 56272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 56372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek Mem->second = IDData; 5647e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(IDData[0] != '\0'); 565ea9c26b3dbd74a1497f5609ae6e19a85f42b6073Ted Kremenek IdentifierInfo *II = new ((void*) Mem) IdentifierInfo(); 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Store the new IdentifierInfo in the cache. 56877ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner PerIDCache[PersistentID] = II; 569e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar assert(II->getNameStart() && II->getNameStart()[0] != '\0'); 5700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 5710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 5720c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 573700030ebddb987936d4fee14d9412821d96e4840Kovarththanan RajaratnamIdentifierInfo* PTHManager::get(llvm::StringRef Name) { 5747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek PTHStringIdLookup& SL = *((PTHStringIdLookup*)StringIdLookup); 5757e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Double check our assumption that the last character isn't '\0'. 576700030ebddb987936d4fee14d9412821d96e4840Kovarththanan Rajaratnam assert(Name.empty() || Name.data()[Name.size()-1] != '\0'); 577700030ebddb987936d4fee14d9412821d96e4840Kovarththanan Rajaratnam PTHStringIdLookup::iterator I = SL.find(std::make_pair(Name.data(), 578700030ebddb987936d4fee14d9412821d96e4840Kovarththanan Rajaratnam Name.size())); 5797e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (I == SL.end()) // No identifier found? 5807e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return 0; 58172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 5827e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Match found. Return the identifier! 5837e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(*I > 0); 5847e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return GetIdentifierInfo(*I-1); 5857e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek} 58672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 587f056d92e182cbe4f62c8d14102544dc38066dabcChris LattnerPTHLexer *PTHManager::CreateLexer(FileID FID) { 588f056d92e182cbe4f62c8d14102544dc38066dabcChris Lattner const FileEntry *FE = PP->getSourceManager().getFileEntryForID(FID); 5890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 5900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 5930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 5940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 595d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup& PFL = *((PTHFileLookup*)FileLookup); 596d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup::iterator I = PFL.find(FE); 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 598d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek if (I == PFL.end()) // No tokens available? 5990c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 6001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const PTHFileData& FileData = *I; 6021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 603da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *BufStart = (const unsigned char *)Buf->getBufferStart(); 6040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 605da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* data = BufStart + FileData.getTokenOffset(); 606268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 607268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 608da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* ppcond = BufStart + FileData.getPPCondOffset(); 6095ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(ppcond); 6101b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) ppcond = 0; 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 61272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(PP && "No preprocessor set yet!"); 6131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new PTHLexer(*PP, FID, data, ppcond, *this); 6140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 615337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 616337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 617337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek// 'stat' caching. 618337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 619337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 620337edcdbec05316b407d0d64865c88ff8597d910Ted Kremeneknamespace { 62185b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHStatData { 622337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 623a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek const bool hasStat; 624337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const ino_t ino; 625337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const dev_t dev; 626337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const mode_t mode; 627337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const time_t mtime; 628337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const off_t size; 6291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 630337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek PTHStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump : hasStat(true), ino(i), dev(d), mode(mo), mtime(m), size(s) {} 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek PTHStatData() 634a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek : hasStat(false), ino(0), dev(0), mode(0), mtime(0), size(0) {} 635337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 63785b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHStatLookupTrait : public PTHFileLookupCommonTrait { 638337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 639a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef const char* external_key_type; // const char* 640337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHStatData data_type; 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 642a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const char *path) { 643a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // The key 'kind' doesn't matter here because it is ignored in EqualKey. 644a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x0, path); 645a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 646a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 647a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 648a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // When doing 'stat' lookups we don't care about the kind of 'a' and 'b', 649a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // just the paths. 650a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return strcmp(a.second, b.second) == 0; 6511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 6521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 653a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static data_type ReadData(const internal_key_type& k, const unsigned char* d, 6541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned) { 6551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 656ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (k.first /* File or Directory */) { 657ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (k.first == 0x1 /* File */) d += 4 * 2; // Skip the first 2 words. 658a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek ino_t ino = (ino_t) ReadUnalignedLE32(d); 659a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek dev_t dev = (dev_t) ReadUnalignedLE32(d); 660a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek mode_t mode = (mode_t) ReadUnalignedLE16(d); 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump time_t mtime = (time_t) ReadUnalignedLE64(d); 662a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return data_type(ino, dev, mode, mtime, (off_t) ReadUnalignedLE64(d)); 663a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 664ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 665ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek // Negative stat. Don't read anything. 666a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return data_type(); 667337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 668337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 669337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 67085b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass PTHStatCache : public StatSysCallCache { 671337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef OnDiskChainedHashTable<PTHStatLookupTrait> CacheTy; 672337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek CacheTy Cache; 673337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 6741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumppublic: 675337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek PTHStatCache(PTHFileLookup &FL) : 676337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek Cache(FL.getNumBuckets(), FL.getNumEntries(), FL.getBuckets(), 677337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek FL.getBase()) {} 678337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 679337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek ~PTHStatCache() {} 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 681337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek int stat(const char *path, struct stat *buf) { 682337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // Do the lookup for the file's data in the PTH file. 683337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek CacheTy::iterator I = Cache.find(path); 684337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 685337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // If we don't get a hit in the PTH file just forward to 'stat'. 686700030ebddb987936d4fee14d9412821d96e4840Kovarththanan Rajaratnam if (I == Cache.end()) 68752e7108f51a4a9f4d6e84f33fb594d06e1d79560Douglas Gregor return StatSysCallCache::stat(path, buf); 6881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 689337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const PTHStatData& Data = *I; 6901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 691ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (!Data.hasStat) 692ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek return 1; 693ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 694337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_ino = Data.ino; 695337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_dev = Data.dev; 696337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_mtime = Data.mtime; 697337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_mode = Data.mode; 698337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_size = Data.size; 699337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek return 0; 700337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 701337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 702d578569d50adc6e9b1a2f91931add6b471b2378eTed Kremenek} // end anonymous namespace 703337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 704337edcdbec05316b407d0d64865c88ff8597d910Ted KremenekStatSysCallCache *PTHManager::createStatCache() { 7055f747d187bf8dc779a4acc180f9c21f1dbf83f6aTed Kremenek return new PTHStatCache(*((PTHFileLookup*) FileLookup)); 706337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek} 707