PTHLexer.cpp revision 52e7108f51a4a9f4d6e84f33fb594d06e1d79560
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/StringMap.h" 240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/ADT/OwningPtr.h" 256f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner#include "llvm/Support/MemoryBuffer.h" 26337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek#include <sys/stat.h> 27274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekusing namespace clang; 289378ba44b3f46d697653003c784be87746e138d2Douglas Gregorusing namespace clang::io; 29274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 307b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek#define DISK_TOKEN_SIZE (1+1+2+4+4) 31268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 32e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 33e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// PTHLexer methods. 34e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 35e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 36da9d61c96c412f6babc7f824152609562f302388Chris LattnerPTHLexer::PTHLexer(Preprocessor &PP, FileID FID, const unsigned char *D, 37277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek const unsigned char *ppcond, PTHManager &PM) 382b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner : PreprocessorLexer(&PP, FID), TokBuf(D), CurPtr(D), LastHashTokPtr(0), 39277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek PPCond(ppcond), CurPPCondPtr(ppcond), PTHMgr(PM) { 401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 412b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileStartLoc = PP.getSourceManager().getLocForStartOfFile(FID); 425f074266cc59563036c40516c814d63825723e20Ted Kremenek} 43274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 44e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekvoid PTHLexer::Lex(Token& Tok) { 45e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted KremenekLexNextToken: 46866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 47866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 48866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read the raw token data. 49866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Shadow CurPtr into an automatic variable. 521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char *CurPtrShadow = CurPtr; 53866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 541b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // Read in the data for the token. 555ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Word0 = ReadLE32(CurPtrShadow); 565ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t IdentifierID = ReadLE32(CurPtrShadow); 575ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t FileOffset = ReadLE32(CurPtrShadow); 581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 597b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek tok::TokenKind TKind = (tok::TokenKind) (Word0 & 0xFF); 607b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek Token::TokenFlags TFlags = (Token::TokenFlags) ((Word0 >> 8) & 0xFF); 61aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner uint32_t Len = Word0 >> 16; 627b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 63aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner CurPtr = CurPtrShadow; 641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 66866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Construct the token itself. 67866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 69866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.startToken(); 70898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setKind(TKind); 71898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setFlag(TFlags); 7259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 732b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner Tok.setLocation(FileStartLoc.getFileLocWithOffset(FileOffset)); 74866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLength(Len); 7589d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 76d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner // Handle identifiers. 77277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (Tok.isLiteral()) { 78277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek Tok.setLiteralData((const char*) (PTHMgr.SpellingBase + IdentifierID)); 79277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 80277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek else if (IdentifierID) { 81d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner MIOpt.ReadToken(); 82d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner IdentifierInfo *II = PTHMgr.GetIdentifierInfo(IdentifierID-1); 831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 84d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner Tok.setIdentifierInfo(II); 851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // Change the kind of this identifier to the appropriate token kind, e.g. 87863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // turning "for" into a keyword. 88863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner Tok.setKind(II->getTokenID()); 891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 90d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (II->isHandleIdentifierCase()) 91d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner PP->HandleIdentifier(Tok); 92d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner return; 93d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner } 941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 95866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 96866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Process the token. 97866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#if 0 995f074266cc59563036c40516c814d63825723e20Ted Kremenek SourceManager& SM = PP->getSourceManager(); 1006cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer llvm::errs() << SM.getFileEntryForID(FileID)->getName() 1015f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalLineNumber(Tok.getLocation()) 1025f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalColumnNumber(Tok.getLocation()) 1035f074266cc59563036c40516c814d63825723e20Ted Kremenek << '\n'; 1041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#endif 10589d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 106898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eof) { 107e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 108e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 1091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 110cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 1111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!ParsingPreprocessorDirective); 11359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 1141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek // FIXME: Issue diagnostics similar to Lexer. 11659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->HandleEndOfFile(Tok, false)) 117d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 1181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 119cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek assert(PPCache && "Raw buffer::LexEndOfFile should return a token"); 120cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PPCache->Lex(Tok); 121cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 1221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 123898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::hash && Tok.isAtStartOfLine()) { 12459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 12559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 12659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek PP->HandleDirective(Tok); 1271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->isCurrentLexer(this)) 12959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek goto LexNextToken; 1301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return PP->Lex(Tok); 132e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 1331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 134898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eom) { 13559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(ParsingPreprocessorDirective); 13659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek ParsingPreprocessorDirective = false; 13759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return; 13859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek } 139274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 14059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek MIOpt.ReadToken(); 141cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 142cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 143e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 144e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 14559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenekvoid PTHLexer::getEOF(Token& Tok) { 146defb7094c835998bb821e894253287625ce8c74dTed Kremenek assert(EofToken.is(tok::eof)); 1470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 148274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 14917ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 15017ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 15117ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 15217ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1534d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 154e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 155e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 156e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 1571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 15974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 16074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 161da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* p = CurPtr; 16274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 16374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 16474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 16574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 1661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 16874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 16980d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 17074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 17174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 17274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 17374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 1741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 17617ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1770c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 178268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 179268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 180268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 181268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 1821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 183da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryI = 0; 1841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t Offset; 185268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 1861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 187268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 18841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 1895ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Offset = ReadLE32(CurPPCondPtr); 1901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Read the target table index from the side-table. 1925ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(CurPPCondPtr); 1931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 19541a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 19641a2660377d215d004fe413c03874bd066b5384cTed Kremenek 19741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 19841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 19941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 20041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 20141a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 20241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 20341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 20441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 205da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = 206da9d61c96c412f6babc7f824152609562f302388Chris Lattner PPCond + TableIdx*(sizeof(uint32_t)*2); 20741a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 20841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 2095ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TmpOffset = ReadLE32(NextPPCondPtr); 210da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryJ = TokBuf + TmpOffset; 2111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21241a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 21341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 21441a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 21541a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 2165ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(NextPPCondPtr); 21741a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 220268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 2211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while (HashEntryI < LastHashTokPtr); 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 223268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 2241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 225268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 226da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 227268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 228268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 2291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 230268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 2315ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner HashEntryI = TokBuf + ReadLE32(NextPPCondPtr); 2325ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NextIdx = ReadLE32(NextPPCondPtr); 2331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 234268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 235268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 236268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 2371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 238268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 239268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 240268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 241268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 242268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 243268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 244268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 2461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24741a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 24841a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 249268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 250268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 251e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 252268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 25341a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 2541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 258268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 25941a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 2601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 261268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 262268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 263268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 265e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 266da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(((tok::TokenKind)*CurPtr) == tok::hash); 267e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 2681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 269268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 270e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 271268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 272268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 274268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 27530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 2761b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // getSourceLocation is not on the hot path. It is used to get the location 2771b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // of the next token when transitioning back to this lexer when done 27830a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 27930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 28030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 281b248d53f2599d8e7b53b144b713e163ca521ffcaTed Kremenek const unsigned char *OffsetPtr = CurPtr + (DISK_TOKEN_SIZE - 4); 2825ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Offset = ReadLE32(OffsetPtr); 2831b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return FileStartLoc.getFileLocWithOffset(Offset); 28430a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 28530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 2865f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 287d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek// PTH file lookup: map from strings to file data. 288d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek//===----------------------------------------------------------------------===// 2890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 2900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 2910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 2920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 2930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 294d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenekclass VISIBILITY_HIDDEN PTHFileData { 295d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t TokenOff; 296d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek const uint32_t PPCondOff; 2970c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 298d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileData(uint32_t tokenOff, uint32_t ppCondOff) 299d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek : TokenOff(tokenOff), PPCondOff(ppCondOff) {} 3001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getTokenOffset() const { return TokenOff; } 3021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump uint32_t getPPCondOffset() const { return PPCondOff; } 303d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek}; 3041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 306337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookupCommonTrait { 3070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 308a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef std::pair<unsigned char, const char*> internal_key_type; 309a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 310a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static unsigned ComputeHash(internal_key_type x) { 311a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return BernsteinHash(x.second); 312d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 3131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 314d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek static std::pair<unsigned, unsigned> 315d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 316a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned keyLen = (unsigned) ReadUnalignedLE16(d); 317a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned dataLen = (unsigned) *(d++); 318a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(keyLen, dataLen); 3190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 321a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type ReadKey(const unsigned char* d, unsigned) { 322a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned char k = *(d++); // Read the entry kind. 323a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair(k, (const char*) d); 324d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek } 325337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 3261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 327337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookupTrait : public PTHFileLookupCommonTrait { 328337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 329337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef const FileEntry* external_key_type; 330337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHFileData data_type; 3311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 332a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const FileEntry* FE) { 333a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x1, FE->getName()); 334337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 335a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 336a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 337a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return a.first == b.first && strcmp(a.second, b.second) == 0; 3381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 3391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump static PTHFileData ReadData(const internal_key_type& k, 3411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const unsigned char* d, unsigned) { 342a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek assert(k.first == 0x1 && "Only file lookups can match!"); 343d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t x = ::ReadUnalignedLE32(d); 344d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek uint32_t y = ::ReadUnalignedLE32(d); 3451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return PTHFileData(x, y); 3460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 3470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 3487e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3497e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenekclass VISIBILITY_HIDDEN PTHStringLookupTrait { 3507e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenekpublic: 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump typedef uint32_t 3527e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek data_type; 3537e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3547e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef const std::pair<const char*, unsigned> 3557e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek external_key_type; 3567e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 3577e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek typedef external_key_type internal_key_type; 3581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3597e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static bool EqualKey(const internal_key_type& a, 3607e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const internal_key_type& b) { 3617e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 3627e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek : false; 3637e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3657e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static unsigned ComputeHash(const internal_key_type& a) { 3667e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return BernsteinHash(a.first, a.second); 3677e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3697e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // This hopefully will just get inlined and removed by the optimizer. 3707e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static const internal_key_type& 3717e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek GetInternalKey(const external_key_type& x) { return x; } 3721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3737e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<unsigned, unsigned> 3747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKeyDataLength(const unsigned char*& d) { 3757e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((unsigned) ReadUnalignedLE16(d), sizeof(uint32_t)); 3767e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3787e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek static std::pair<const char*, unsigned> 3797e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek ReadKey(const unsigned char* d, unsigned n) { 3807e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(n >= 2 && d[n-1] == '\0'); 3817e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return std::make_pair((const char*) d, n-1); 3827e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 384a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static uint32_t ReadData(const internal_key_type& k, const unsigned char* d, 385a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek unsigned) { 3867e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return ::ReadUnalignedLE32(d); 3877e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek } 3887e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek}; 3891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end anonymous namespace 391d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek 3927e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHFileLookupTrait> PTHFileLookup; 3937e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenektypedef OnDiskChainedHashTable<PTHStringLookupTrait> PTHStringIdLookup; 3940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3960c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 3970c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 3980c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 3990c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 400da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* idDataTable, 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IdentifierInfo** perIDCache, 4027e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek void* stringIdLookup, unsigned numIds, 40368228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* spellingBase, 40468228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const char* originalSourceFile) 4056183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 4067e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek IdDataTable(idDataTable), StringIdLookup(stringIdLookup), 40768228634016f644a1164fa1f024a9ce2093656bfTed Kremenek NumIds(numIds), PP(0), SpellingBase(spellingBase), 40868228634016f644a1164fa1f024a9ce2093656bfTed Kremenek OriginalSourceFile(originalSourceFile) {} 4090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4100c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 4110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 4120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 4137e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek delete (PTHStringIdLookup*) StringIdLookup; 4140e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 4150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 4160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 41722f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenekstatic void InvalidPTH(Diagnostic *Diags, Diagnostic::Level level, 41822f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek const char* Msg = 0) { 4191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Diags) return; 42026555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek if (!Msg) Msg = "Invalid or corrupted PTH file"; 42122f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek unsigned DiagID = Diags->getCustomDiagID(level, Msg); 42226555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek Diags->Report(FullSourceLoc(), DiagID); 42326555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek} 42426555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek 42522f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted KremenekPTHManager* PTHManager::Create(const std::string& file, Diagnostic* Diags, 42622f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek Diagnostic::Level level) { 4270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 4280c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 4290c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 4301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4318a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek if (!File) { 4328a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek if (Diags) { 43322f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek unsigned DiagID = Diags->getCustomDiagID(level, 4348a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek "PTH file %0 could not be read"); 4358a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek Diags->Report(FullSourceLoc(), DiagID) << file; 4368a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek } 4377e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 4380c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 4398a6aec620dbec1f292fe4116c0373ac81ab90234Ted Kremenek } 4401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4410c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 4420c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 443da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufBeg = (unsigned char*)File->getBufferStart(); 444da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufEnd = (unsigned char*)File->getBufferEnd(); 445e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek 446e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek // Check the prologue of the file. 4474adc71ae2cfc190f8d2cf58876e2a7893aa74ee0Ted Kremenek if ((BufEnd - BufBeg) < (signed) (sizeof("cfe-pth") + 3 + 4) || 44826555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek memcmp(BufBeg, "cfe-pth", sizeof("cfe-pth") - 1) != 0) { 44922f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 450e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 45126555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45367d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek // Read the PTH version. 454e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek const unsigned char *p = BufBeg + (sizeof("cfe-pth") - 1); 45567d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek unsigned Version = ReadLE32(p); 4561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45726555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek if (Version != PTHManager::Version) { 45822f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level, 4591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Version < PTHManager::Version 46026555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek ? "PTH file uses an older PTH format that is no longer supported" 46126555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek : "PTH file uses a newer PTH format that cannot be read"); 46267d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek return 0; 46326555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 46467d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek 4651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Compute the address of the index table at the end of the PTH file. 466a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char *PrologueOffset = p; 4671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 468a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek if (PrologueOffset >= BufEnd) { 46922f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 470e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 47126555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek } 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 4740c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 475a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* FileTableOffset = PrologueOffset + sizeof(uint32_t)*2; 4765ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* FileTable = BufBeg + ReadLE32(FileTableOffset); 4771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4780c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 47922f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 4800c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 4810c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 483d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(PTHFileLookup::Create(FileTable, BufBeg)); 4841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4851d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // Warn if the PTH file is empty. We still want to create a PTHManager 4861d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek // as the PTH could be used with -include-pth. 4871d20197cb9478f3db17cbcfc57a1f8182843fc6aTed Kremenek if (FL->isEmpty()) 48822f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level, "PTH file contains no cached source data"); 4891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 4910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 492a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* IDTableOffset = PrologueOffset + sizeof(uint32_t)*0; 4935ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* IData = BufBeg + ReadLE32(IDTableOffset); 4941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 495cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(IData >= BufBeg && IData < BufEnd)) { 49622f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 49726555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 4980c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5007e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Get the location of the hashtable mapping between strings and 5017e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // persistent IDs. 502a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* StringIdTableOffset = PrologueOffset + sizeof(uint32_t)*1; 5037e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek const unsigned char* StringIdTable = BufBeg + ReadLE32(StringIdTableOffset); 5047e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (!(StringIdTable >= BufBeg && StringIdTable < BufEnd)) { 50522f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 50626555b18aa2c3b78744e77927acd3faa53ae7369Ted Kremenek return 0; 50772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 5087e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek 5097e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek llvm::OwningPtr<PTHStringIdLookup> SL(PTHStringIdLookup::Create(StringIdTable, 5107e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek BufBeg)); 5111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 512277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek // Get the location of the spelling cache. 513a4bd8eb4d6d4b625f6bbb62fc180b02eab6433edTed Kremenek const unsigned char* spellingBaseOffset = PrologueOffset + sizeof(uint32_t)*3; 514277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek const unsigned char* spellingBase = BufBeg + ReadLE32(spellingBaseOffset); 515277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek if (!(spellingBase >= BufBeg && spellingBase < BufEnd)) { 51622f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek InvalidPTH(Diags, level); 517277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek return 0; 518277faca30c9f8f72b79f55695cbe3395ec246e7cTed Kremenek } 5191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5206183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 5215ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NumIds = ReadLE32(IData); 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5236183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 5246183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 5256183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 526cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek IdentifierInfo** PerIDCache = 0; 5271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 528cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (NumIds) { 5291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump PerIDCache = (IdentifierInfo**)calloc(NumIds, sizeof(*PerIDCache)); 530cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!PerIDCache) { 5311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump InvalidPTH(Diags, level, 53222f0d09298ef05136f1ef6ebc4469b482cbd73e7Ted Kremenek "Could not allocate memory for processing PTH file"); 533cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 534cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 5356183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 536cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 53768228634016f644a1164fa1f024a9ce2093656bfTed Kremenek // Compute the address of the original source file. 53868228634016f644a1164fa1f024a9ce2093656bfTed Kremenek const unsigned char* originalSourceBase = PrologueOffset + sizeof(uint32_t)*4; 53968228634016f644a1164fa1f024a9ce2093656bfTed Kremenek unsigned len = ReadUnalignedLE16(originalSourceBase); 5401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!len) originalSourceBase = 0; 5411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 54272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Create the new PTHManager. 54372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, 54468228634016f644a1164fa1f024a9ce2093656bfTed Kremenek SL.take(), NumIds, spellingBase, 54568228634016f644a1164fa1f024a9ce2093656bfTed Kremenek (const char*) originalSourceBase); 5460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 54768228634016f644a1164fa1f024a9ce2093656bfTed Kremenek 54877ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris LattnerIdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) { 5490c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 55077ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner const unsigned char* TableEntry = IdDataTable + sizeof(uint32_t)*PersistentID; 551da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDData = 5525ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner (const unsigned char*)Buf->getBufferStart() + ReadLE32(TableEntry); 553da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(IDData < (const unsigned char*)Buf->getBufferEnd()); 5541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Allocate the object. 556da9d61c96c412f6babc7f824152609562f302388Chris Lattner std::pair<IdentifierInfo,const unsigned char*> *Mem = 557da9d61c96c412f6babc7f824152609562f302388Chris Lattner Alloc.Allocate<std::pair<IdentifierInfo,const unsigned char*> >(); 55872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 55972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek Mem->second = IDData; 5607e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(IDData[0] != '\0'); 561ea9c26b3dbd74a1497f5609ae6e19a85f42b6073Ted Kremenek IdentifierInfo *II = new ((void*) Mem) IdentifierInfo(); 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Store the new IdentifierInfo in the cache. 56477ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner PerIDCache[PersistentID] = II; 5657e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(II->getName() && II->getName()[0] != '\0'); 5660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 5670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 5680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 56972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekIdentifierInfo* PTHManager::get(const char *NameStart, const char *NameEnd) { 5707e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek PTHStringIdLookup& SL = *((PTHStringIdLookup*)StringIdLookup); 5717e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Double check our assumption that the last character isn't '\0'. 57282320e94606cfb0f68c6049c070c3600f8df9081Daniel Dunbar assert(NameEnd==NameStart || NameStart[NameEnd-NameStart-1] != '\0'); 5737e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek PTHStringIdLookup::iterator I = SL.find(std::make_pair(NameStart, 5747e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek NameEnd - NameStart)); 5757e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek if (I == SL.end()) // No identifier found? 5767e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return 0; 57772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 5787e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek // Match found. Return the identifier! 5797e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek assert(*I > 0); 5807e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek return GetIdentifierInfo(*I-1); 5817e3a004c6ed1fe87912203b9c5a113f8da89d261Ted Kremenek} 58272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 583f056d92e182cbe4f62c8d14102544dc38066dabcChris LattnerPTHLexer *PTHManager::CreateLexer(FileID FID) { 584f056d92e182cbe4f62c8d14102544dc38066dabcChris Lattner const FileEntry *FE = PP->getSourceManager().getFileEntryForID(FID); 5850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 5860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 5890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 5900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 591d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup& PFL = *((PTHFileLookup*)FileLookup); 592d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek PTHFileLookup::iterator I = PFL.find(FE); 5931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 594d8c02929fe70f03111be73e7b8c402c724238ee9Ted Kremenek if (I == PFL.end()) // No tokens available? 5950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const PTHFileData& FileData = *I; 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 599da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *BufStart = (const unsigned char *)Buf->getBufferStart(); 6000c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 601da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* data = BufStart + FileData.getTokenOffset(); 602268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 603268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 604da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* ppcond = BufStart + FileData.getPPCondOffset(); 6055ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(ppcond); 6061b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) ppcond = 0; 6071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 60872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(PP && "No preprocessor set yet!"); 6091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new PTHLexer(*PP, FID, data, ppcond, *this); 6100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 611337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 612337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 613337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek// 'stat' caching. 614337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek//===----------------------------------------------------------------------===// 615337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 616337edcdbec05316b407d0d64865c88ff8597d910Ted Kremeneknamespace { 617337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHStatData { 618337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 619a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek const bool hasStat; 620337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const ino_t ino; 621337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const dev_t dev; 622337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const mode_t mode; 623337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const time_t mtime; 624337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const off_t size; 6251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 626337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek PTHStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump : hasStat(true), ino(i), dev(d), mode(mo), mtime(m), size(s) {} 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 629a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek PTHStatData() 630a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek : hasStat(false), ino(0), dev(0), mode(0), mtime(0), size(0) {} 631337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHStatLookupTrait : public PTHFileLookupCommonTrait { 634337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekpublic: 635a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek typedef const char* external_key_type; // const char* 636337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef PTHStatData data_type; 6371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 638a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static internal_key_type GetInternalKey(const char *path) { 639a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // The key 'kind' doesn't matter here because it is ignored in EqualKey. 640a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return std::make_pair((unsigned char) 0x0, path); 641a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 642a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek 643a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static bool EqualKey(internal_key_type a, internal_key_type b) { 644a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // When doing 'stat' lookups we don't care about the kind of 'a' and 'b', 645a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek // just the paths. 646a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return strcmp(a.second, b.second) == 0; 6471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 6481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 649a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek static data_type ReadData(const internal_key_type& k, const unsigned char* d, 6501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned) { 6511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 652ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (k.first /* File or Directory */) { 653ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (k.first == 0x1 /* File */) d += 4 * 2; // Skip the first 2 words. 654a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek ino_t ino = (ino_t) ReadUnalignedLE32(d); 655a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek dev_t dev = (dev_t) ReadUnalignedLE32(d); 656a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek mode_t mode = (mode_t) ReadUnalignedLE16(d); 6571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump time_t mtime = (time_t) ReadUnalignedLE64(d); 658a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return data_type(ino, dev, mode, mtime, (off_t) ReadUnalignedLE64(d)); 659a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek } 660ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 661ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek // Negative stat. Don't read anything. 662a4b44dd9d30929a35c44d85102e5241ee847b2f2Ted Kremenek return data_type(); 663337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 664337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 665337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 666337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenekclass VISIBILITY_HIDDEN PTHStatCache : public StatSysCallCache { 667337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek typedef OnDiskChainedHashTable<PTHStatLookupTrait> CacheTy; 668337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek CacheTy Cache; 669337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 6701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumppublic: 671337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek PTHStatCache(PTHFileLookup &FL) : 672337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek Cache(FL.getNumBuckets(), FL.getNumEntries(), FL.getBuckets(), 673337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek FL.getBase()) {} 674337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 675337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek ~PTHStatCache() {} 6761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 677337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek int stat(const char *path, struct stat *buf) { 678337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // Do the lookup for the file's data in the PTH file. 679337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek CacheTy::iterator I = Cache.find(path); 680337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 681337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek // If we don't get a hit in the PTH file just forward to 'stat'. 68252e7108f51a4a9f4d6e84f33fb594d06e1d79560Douglas Gregor if (I == Cache.end()) 68352e7108f51a4a9f4d6e84f33fb594d06e1d79560Douglas Gregor return StatSysCallCache::stat(path, buf); 6841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 685337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek const PTHStatData& Data = *I; 6861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 687ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek if (!Data.hasStat) 688ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek return 1; 689ad6ce5cb0e3b5dd853d2b1e337797a6fc1091e21Ted Kremenek 690337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_ino = Data.ino; 691337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_dev = Data.dev; 692337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_mtime = Data.mtime; 693337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_mode = Data.mode; 694337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek buf->st_size = Data.size; 695337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek return 0; 696337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek } 697337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek}; 698d578569d50adc6e9b1a2f91931add6b471b2378eTed Kremenek} // end anonymous namespace 699337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek 700337edcdbec05316b407d0d64865c88ff8597d910Ted KremenekStatSysCallCache *PTHManager::createStatCache() { 7015f747d187bf8dc779a4acc180f9c21f1dbf83f6aTed Kremenek return new PTHStatCache(*((PTHFileLookup*) FileLookup)); 702337edcdbec05316b407d0d64865c88ff8597d910Ted Kremenek} 703