PTHLexer.cpp revision e013d685c6689ac7ae103ee88acf573422d1ed6a
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" 18274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/PTHLexer.h" 19274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/Preprocessor.h" 200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/PTHManager.h" 210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Token.h" 220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Preprocessor.h" 230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/ADT/OwningPtr.h" 242596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar#include "llvm/ADT/StringExtras.h" 252596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar#include "llvm/ADT/StringMap.h" 266f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner#include "llvm/Support/MemoryBuffer.h" 27337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek#include <sys/stat.h> 28274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekusing namespace clang; 299378ba44b3f46d697653003c784be87746e138d2Douglas Gregorusing namespace clang::io; 30274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 317b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek#define DISK_TOKEN_SIZE (1+1+2+4+4) 32268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 33e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 34e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// PTHLexer methods. 35e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 36e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 37da9d61c96c412f6babc7f824152609562f302388Chris LattnerPTHLexer::PTHLexer(Preprocessor &PP, FileID FID, const unsigned char *D, 38277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek const unsigned char *ppcond, PTHManager &PM) 392b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner : PreprocessorLexer(&PP, FID), TokBuf(D), CurPtr(D), LastHashTokPtr(0), 40277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek PPCond(ppcond), CurPPCondPtr(ppcond), PTHMgr(PM) { 411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 422b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileStartLoc = PP.getSourceManager().getLocForStartOfFile(FID); 435f074266cc59563036c40516c814d63825723e20Ted Kremenek} 44274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 45e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekvoid PTHLexer::Lex(Token& Tok) { 46e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted KremenekLexNextToken: 47866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 48866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 49866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read the raw token data. 50866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Shadow CurPtr into an automatic variable. 531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char *CurPtrShadow = CurPtr; 54866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 551b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // Read in the data for the token. 565ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Word0 = ReadLE32(CurPtrShadow); 575ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t IdentifierID = ReadLE32(CurPtrShadow); 585ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t FileOffset = ReadLE32(CurPtrShadow); 591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 607b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek tok::TokenKind TKind = (tok::TokenKind) (Word0 & 0xFF); 617b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek Token::TokenFlags TFlags = (Token::TokenFlags) ((Word0 >> 8) & 0xFF); 62aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner uint32_t Len = Word0 >> 16; 637b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 64aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner CurPtr = CurPtrShadow; 651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 66866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 67866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Construct the token itself. 68866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 70866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.startToken(); 71898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setKind(TKind); 72898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setFlag(TFlags); 7359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 742b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner Tok.setLocation(FileStartLoc.getFileLocWithOffset(FileOffset)); 75866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLength(Len); 7689d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 77d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner // Handle identifiers. 78277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (Tok.isLiteral()) { 79277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek Tok.setLiteralData((const char*) (PTHMgr.SpellingBase + IdentifierID)); 80277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 81277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek else if (IdentifierID) { 82d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner MIOpt.ReadToken(); 83d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner IdentifierInfo *II = PTHMgr.GetIdentifierInfo(IdentifierID-1); 841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 85d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner Tok.setIdentifierInfo(II); 861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // Change the kind of this identifier to the appropriate token kind, e.g. 88863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // turning "for" into a keyword. 89863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner Tok.setKind(II->getTokenID()); 901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 91d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (II->isHandleIdentifierCase()) 92d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner PP->HandleIdentifier(Tok); 93d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner return; 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 103cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 1041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!ParsingPreprocessorDirective); 10659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek // FIXME: Issue diagnostics similar to Lexer. 10959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->HandleEndOfFile(Tok, false)) 110d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 1111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 112cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek assert(PPCache && "Raw buffer::LexEndOfFile should return a token"); 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 136e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 137e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 13859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenekvoid PTHLexer::getEOF(Token& Tok) { 139defb7094c835998bb821e894253287625ce8c74dTed Kremenek assert(EofToken.is(tok::eof)); 1400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 141274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 14217ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 14317ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 14417ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 14517ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1464d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 147e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 148e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 149e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 1501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 15274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 15374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 154da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* p = CurPtr; 15574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 15674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 15774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 15874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 1591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 16174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 16280d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 16374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 16474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 16574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 16674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 1671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 16917ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 171268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 172268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 173268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 174268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 1751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 176da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryI = 0; 1771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t Offset; 178268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 1791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 180268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 18141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 1825ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Offset = ReadLE32(CurPPCondPtr); 1831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Read the target table index from the side-table. 1855ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(CurPPCondPtr); 1861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 18841a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 18941a2660377d215d004fe413c03874bd066b5384cTed Kremenek 19041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 19141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 19241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 19341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 19441a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 19541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 19641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 19741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 198da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = 199da9d61c96c412f6babc7f824152609562f302388Chris Lattner PPCond + TableIdx*(sizeof(uint32_t)*2); 20041a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 20141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 2025ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TmpOffset = ReadLE32(NextPPCondPtr); 203da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryJ = TokBuf + TmpOffset; 2041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20541a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 20641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 20741a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 20841a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 2095ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(NextPPCondPtr); 21041a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 21141a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 21241a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 213268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 2141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while (HashEntryI < LastHashTokPtr); 21541a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 216268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 2171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 218268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 219da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 220268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 221268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 2221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 223268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 2245ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner HashEntryI = TokBuf + ReadLE32(NextPPCondPtr); 2255ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NextIdx = ReadLE32(NextPPCondPtr); 2261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 227268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 228268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 229268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 2301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 231268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 232268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 233268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 234268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 235268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 236268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 237268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 238268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 2391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24041a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 24141a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 242268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 243268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 244e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 24641a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 2471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 248268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 249268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 250268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 251268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 25241a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 2531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 258e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 259da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(((tok::TokenKind)*CurPtr) == tok::hash); 260e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 262268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 263e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 265268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 266268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 26830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 2691b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // getSourceLocation is not on the hot path. It is used to get the location 2701b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // of the next token when transitioning back to this lexer when done 27130a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 27230a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 27330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 274b248d53f2599d8e7b53b144b713e163ca521ffcaTed Kremenek const unsigned char *OffsetPtr = CurPtr + (DISK_TOKEN_SIZE - 4); 2755ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Offset = ReadLE32(OffsetPtr); 2761b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return FileStartLoc.getFileLocWithOffset(Offset); 27730a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 27830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 2795f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 280d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek// PTH file lookup: map from strings to file data. 281d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek//===----------------------------------------------------------------------===// 2820c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 2830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 2840c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 2850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 2860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 287d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenekclass VISIBILITY_HIDDEN PTHFileData { 288d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t TokenOff; 289d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t PPCondOff; 2900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 291d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileData(uint32_t tokenOff, uint32_t ppCondOff) 292d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek : TokenOff(tokenOff), PPCondOff(ppCondOff) {} 2931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getTokenOffset() const { return TokenOff; } 2951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getPPCondOffset() const { return PPCondOff; } 296d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek}; 2971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 299337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookupCommonTrait { 3000c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 301a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef std::pair<unsigned char, const char*> internal_key_type; 302a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 303a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static unsigned ComputeHash(internal_key_type x) { 3042596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar return llvm::HashString(x.second); 305d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 3061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 307d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek static std::pair<unsigned, unsigned> 308d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 309a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned keyLen = (unsigned) ReadUnalignedLE16(d); 310a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned dataLen = (unsigned) *(d++); 311a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(keyLen, dataLen); 3120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 314a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type ReadKey(const unsigned char* d, unsigned) { 315a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned char k = *(d++); // Read the entry kind. 316a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(k, (const char*) d); 317d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 318337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 3191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 320337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookupTrait : public PTHFileLookupCommonTrait { 321337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 322337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef const FileEntry* external_key_type; 323337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHFileData data_type; 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 325a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const FileEntry* FE) { 326a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x1, FE->getName()); 327337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 328a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 329a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 330a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return a.first == b.first && strcmp(a.second, b.second) == 0; 3311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 3321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump static PTHFileData ReadData(const internal_key_type& k, 3341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char* d, unsigned) { 335a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek assert(k.first == 0x1 && "Only file lookups can match!"); 336d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t x = ::ReadUnalignedLE32(d); 337d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t y = ::ReadUnalignedLE32(d); 3381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return PTHFileData(x, y); 3390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 3417e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3427e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenekclass VISIBILITY_HIDDEN PTHStringLookupTrait { 3437e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenekpublic: 3441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump typedef uint32_t 3457e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek data_type; 3467e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3477e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef const std::pair<const char*, unsigned> 3487e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek external_key_type; 3497e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3507e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef external_key_type internal_key_type; 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3527e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static bool EqualKey(const internal_key_type& a, 3537e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const internal_key_type& b) { 3547e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 3557e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek : false; 3567e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3587e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static unsigned ComputeHash(const internal_key_type& a) { 3592596e429a61602312bdd149786045b8a90cd2d10Daniel Dunbar return llvm::HashString(llvm::StringRef(a.first, a.second)); 3607e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3627e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // This hopefully will just get inlined and removed by the optimizer. 3637e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static const internal_key_type& 3647e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek GetInternalKey(const external_key_type& x) { return x; } 3651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3667e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<unsigned, unsigned> 3677e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 3687e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((unsigned) ReadUnalignedLE16(d), sizeof(uint32_t)); 3697e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3717e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<const char*, unsigned> 3727e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKey(const unsigned char* d, unsigned n) { 3737e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(n >= 2 && d[n-1] == '\0'); 3747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((const char*) d, n-1); 3757e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 377a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static uint32_t ReadData(const internal_key_type& k, const unsigned char* d, 378a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned) { 3797e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return ::ReadUnalignedLE32(d); 3807e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3817e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek}; 3821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end anonymous namespace 384d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek 3857e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHFileLookupTrait> PTHFileLookup; 3867e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHStringLookupTrait> PTHStringIdLookup; 3870c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 3900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3920c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 393da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* idDataTable, 3941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IdentifierInfo** perIDCache, 3957e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek void* stringIdLookup, unsigned numIds, 39668228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* spellingBase, 39768228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const char* originalSourceFile) 3986183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 3997e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek IdDataTable(idDataTable), StringIdLookup(stringIdLookup), 40068228634016f644a1164fa1f024a9ce2093656bfTed Kremenek NumIds(numIds), PP(0), SpellingBase(spellingBase), 40168228634016f644a1164fa1f024a9ce2093656bfTed Kremenek OriginalSourceFile(originalSourceFile) {} 4020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4030c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 4040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 4050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 4067e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek delete (PTHStringIdLookup*) StringIdLookup; 4070e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 4080c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 41022f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenekstatic void InvalidPTH(Diagnostic *Diags, Diagnostic::Level level, 41122f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek const char* Msg = 0) { 4121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Diags) return; 41326555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek if (!Msg) Msg = "Invalid or corrupted PTH file"; 41422f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek unsigned DiagID = Diags->getCustomDiagID(level, Msg); 41526555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek Diags->Report(FullSourceLoc(), DiagID); 41626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek} 41726555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek 41822f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted KremenekPTHManager* PTHManager::Create(const std::string& file, Diagnostic* Diags, 41922f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek Diagnostic::Level level) { 4200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 4210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 4220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 4231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4248a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek if (!File) { 4258a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek if (Diags) { 42622f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek unsigned DiagID = Diags->getCustomDiagID(level, 4278a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek "PTH file %0 could not be read"); 4288a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek Diags->Report(FullSourceLoc(), DiagID) << file; 4298a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek } 4307e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 4310c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4328a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek } 4331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4340c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 4350c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 436da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufBeg = (unsigned char*)File->getBufferStart(); 437da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufEnd = (unsigned char*)File->getBufferEnd(); 438e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek 439e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek // Check the prologue of the file. 4404adc71ae2cfc190f8d2cf58876e2a7893aa74ee0Ted Kremenek if ((BufEnd - BufBeg) < (signed) (sizeof("cfe-pth") + 3 + 4) || 44126555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek memcmp(BufBeg, "cfe-pth", sizeof("cfe-pth") - 1) != 0) { 44222f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 443e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 44426555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44667d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek // Read the PTH version. 447e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek const unsigned char *p = BufBeg + (sizeof("cfe-pth") - 1); 44867d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek unsigned Version = ReadLE32(p); 4491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45026555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek if (Version != PTHManager::Version) { 45122f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level, 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Version < PTHManager::Version 45326555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek ? "PTH file uses an older PTH format that is no longer supported" 45426555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek : "PTH file uses a newer PTH format that cannot be read"); 45567d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek return 0; 45626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 45767d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek 4581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Compute the address of the index table at the end of the PTH file. 459a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char *PrologueOffset = p; 4601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 461a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek if (PrologueOffset >= BufEnd) { 46222f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 463e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 46426555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 4670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 468a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* FileTableOffset = PrologueOffset + sizeof(uint32_t)*2; 4695ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* FileTable = BufBeg + ReadLE32(FileTableOffset); 4701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 47222f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 4730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 476d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(PTHFileLookup::Create(FileTable, BufBeg)); 4771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4781d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // Warn if the PTH file is empty. We still want to create a PTHManager 4791d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // as the PTH could be used with -include-pth. 4801d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek if (FL->isEmpty()) 48122f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level, "PTH file contains no cached source data"); 4821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 4840c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 485a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* IDTableOffset = PrologueOffset + sizeof(uint32_t)*0; 4865ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* IData = BufBeg + ReadLE32(IDTableOffset); 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 488cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(IData >= BufBeg && IData < BufEnd)) { 48922f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 49026555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 4910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4937e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Get the location of the hashtable mapping between strings and 4947e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // persistent IDs. 495a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* StringIdTableOffset = PrologueOffset + sizeof(uint32_t)*1; 4967e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const unsigned char* StringIdTable = BufBeg + ReadLE32(StringIdTableOffset); 4977e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (!(StringIdTable >= BufBeg && StringIdTable < BufEnd)) { 49822f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 49926555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 50072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 5017e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 5027e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek llvm::OwningPtr<PTHStringIdLookup> SL(PTHStringIdLookup::Create(StringIdTable, 5037e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek BufBeg)); 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 505277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek // Get the location of the spelling cache. 506a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* spellingBaseOffset = PrologueOffset + sizeof(uint32_t)*3; 507277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek const unsigned char* spellingBase = BufBeg + ReadLE32(spellingBaseOffset); 508277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (!(spellingBase >= BufBeg && spellingBase < BufEnd)) { 50922f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 510277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek return 0; 511277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 5121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5136183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 5145ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NumIds = ReadLE32(IData); 5151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5166183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 5176183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 5186183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 519cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek IdentifierInfo** PerIDCache = 0; 5201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 521cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (NumIds) { 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump PerIDCache = (IdentifierInfo**)calloc(NumIds, sizeof(*PerIDCache)); 523cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!PerIDCache) { 5241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump InvalidPTH(Diags, level, 52522f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek "Could not allocate memory for processing PTH file"); 526cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 527cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 5286183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 529cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 53068228634016f644a1164fa1f024a9ce2093656bfTed Kremenek // Compute the address of the original source file. 53168228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* originalSourceBase = PrologueOffset + sizeof(uint32_t)*4; 53268228634016f644a1164fa1f024a9ce2093656bfTed Kremenek unsigned len = ReadUnalignedLE16(originalSourceBase); 5331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!len) originalSourceBase = 0; 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Create the new PTHManager. 53672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, 53768228634016f644a1164fa1f024a9ce2093656bfTed Kremenek SL.take(), NumIds, spellingBase, 53868228634016f644a1164fa1f024a9ce2093656bfTed Kremenek (const char*) originalSourceBase); 5390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 54068228634016f644a1164fa1f024a9ce2093656bfTed Kremenek 54177ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris LattnerIdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) { 5420c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 54377ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner const unsigned char* TableEntry = IdDataTable + sizeof(uint32_t)*PersistentID; 544da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDData = 5455ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner (const unsigned char*)Buf->getBufferStart() + ReadLE32(TableEntry); 546da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(IDData < (const unsigned char*)Buf->getBufferEnd()); 5471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 54872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Allocate the object. 549da9d61c96c412f6babc7f824152609562f302388Chris Lattner std::pair<IdentifierInfo,const unsigned char*> *Mem = 550da9d61c96c412f6babc7f824152609562f302388Chris Lattner Alloc.Allocate<std::pair<IdentifierInfo,const unsigned char*> >(); 55172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 55272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek Mem->second = IDData; 5537e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(IDData[0] != '\0'); 554ea9c26b3dbd74a1497f5609ae6e19a85f42b6073Ted Kremenek IdentifierInfo *II = new ((void*) Mem) IdentifierInfo(); 5551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Store the new IdentifierInfo in the cache. 55777ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner PerIDCache[PersistentID] = II; 558e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar assert(II->getNameStart() && II->getNameStart()[0] != '\0'); 5590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 5600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 5610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 56272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekIdentifierInfo* PTHManager::get(const char *NameStart, const char *NameEnd) { 5637e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek PTHStringIdLookup& SL = *((PTHStringIdLookup*)StringIdLookup); 5647e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Double check our assumption that the last character isn't '\0'. 56582320e94606cfb0f68c6049c070c3600f8df9081Daniel Dunbar assert(NameEnd==NameStart || NameStart[NameEnd-NameStart-1] != '\0'); 5667e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek PTHStringIdLookup::iterator I = SL.find(std::make_pair(NameStart, 5677e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek NameEnd - NameStart)); 5687e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (I == SL.end()) // No identifier found? 5697e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return 0; 57072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 5717e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Match found. Return the identifier! 5727e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(*I > 0); 5737e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return GetIdentifierInfo(*I-1); 5747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek} 57572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 576f056d92e182cbe4f62c8d14102544dc38066dabcChris LattnerPTHLexer *PTHManager::CreateLexer(FileID FID) { 577f056d92e182cbe4f62c8d14102544dc38066dabcChris Lattner const FileEntry *FE = PP->getSourceManager().getFileEntryForID(FID); 5780c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 5790c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5810c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 5820c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 5830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 584d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup& PFL = *((PTHFileLookup*)FileLookup); 585d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup::iterator I = PFL.find(FE); 5861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 587d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek if (I == PFL.end()) // No tokens available? 5880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const PTHFileData& FileData = *I; 5911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 592da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *BufStart = (const unsigned char *)Buf->getBufferStart(); 5930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 594da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* data = BufStart + FileData.getTokenOffset(); 595268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 596268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 597da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* ppcond = BufStart + FileData.getPPCondOffset(); 5985ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(ppcond); 5991b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) ppcond = 0; 6001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 60172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(PP && "No preprocessor set yet!"); 6021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new PTHLexer(*PP, FID, data, ppcond, *this); 6030c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 604337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 605337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 606337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek// 'stat' caching. 607337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 608337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 609337edcdbec05316b407d0d64865c88ff8597d910Ted Kremeneknamespace { 610337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHStatData { 611337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 612a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek const bool hasStat; 613337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const ino_t ino; 614337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const dev_t dev; 615337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const mode_t mode; 616337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const time_t mtime; 617337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const off_t size; 6181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 619337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek PTHStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 6201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump : hasStat(true), ino(i), dev(d), mode(mo), mtime(m), size(s) {} 6211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 622a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek PTHStatData() 623a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek : hasStat(false), ino(0), dev(0), mode(0), mtime(0), size(0) {} 624337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 6251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 626337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHStatLookupTrait : public PTHFileLookupCommonTrait { 627337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 628a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef const char* external_key_type; // const char* 629337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHStatData data_type; 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 631a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const char *path) { 632a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // The key 'kind' doesn't matter here because it is ignored in EqualKey. 633a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x0, path); 634a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 635a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 636a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 637a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // When doing 'stat' lookups we don't care about the kind of 'a' and 'b', 638a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // just the paths. 639a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return strcmp(a.second, b.second) == 0; 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 642a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static data_type ReadData(const internal_key_type& k, const unsigned char* d, 6431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned) { 6441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 645ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (k.first /* File or Directory */) { 646ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (k.first == 0x1 /* File */) d += 4 * 2; // Skip the first 2 words. 647a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek ino_t ino = (ino_t) ReadUnalignedLE32(d); 648a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek dev_t dev = (dev_t) ReadUnalignedLE32(d); 649a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek mode_t mode = (mode_t) ReadUnalignedLE16(d); 6501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump time_t mtime = (time_t) ReadUnalignedLE64(d); 651a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return data_type(ino, dev, mode, mtime, (off_t) ReadUnalignedLE64(d)); 652a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 653ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 654ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek // Negative stat. Don't read anything. 655a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return data_type(); 656337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 657337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 658337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 659337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHStatCache : public StatSysCallCache { 660337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef OnDiskChainedHashTable<PTHStatLookupTrait> CacheTy; 661337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek CacheTy Cache; 662337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 6631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumppublic: 664337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek PTHStatCache(PTHFileLookup &FL) : 665337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek Cache(FL.getNumBuckets(), FL.getNumEntries(), FL.getBuckets(), 666337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek FL.getBase()) {} 667337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 668337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek ~PTHStatCache() {} 6691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 670337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek int stat(const char *path, struct stat *buf) { 671337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // Do the lookup for the file's data in the PTH file. 672337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek CacheTy::iterator I = Cache.find(path); 673337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 674337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // If we don't get a hit in the PTH file just forward to 'stat'. 67552e7108f51a4a9f4d6e84f33fb594d06e1d79560Douglas Gregor if (I == Cache.end()) 67652e7108f51a4a9f4d6e84f33fb594d06e1d79560Douglas Gregor return StatSysCallCache::stat(path, buf); 6771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 678337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const PTHStatData& Data = *I; 6791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 680ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (!Data.hasStat) 681ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek return 1; 682ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 683337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_ino = Data.ino; 684337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_dev = Data.dev; 685337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_mtime = Data.mtime; 686337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_mode = Data.mode; 687337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_size = Data.size; 688337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek return 0; 689337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 690337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 691d578569d50adc6e9b1a2f91931add6b471b2378eTed Kremenek} // end anonymous namespace 692337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 693337edcdbec05316b407d0d64865c88ff8597d910Ted KremenekStatSysCallCache *PTHManager::createStatCache() { 6945f747d187bf8dc779a4acc180f9c21f1dbf83f6aTed Kremenek return new PTHStatCache(*((PTHFileLookup*) FileLookup)); 695337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek} 696