2540 lines
87 KiB
C++
2540 lines
87 KiB
C++
//===--- PCHReader.cpp - Precompiled Headers Reader -------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the PCHReader class, which reads a precompiled header.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/PCHReader.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
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#include "../Sema/Sema.h" // FIXME: move Sema headers elsewhere
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/Type.h"
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#include "clang/Lex/MacroInfo.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Basic/OnDiskHashTable.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Basic/SourceManagerInternals.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/TargetInfo.h"
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#include "llvm/Bitcode/BitstreamReader.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <algorithm>
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#include <iterator>
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#include <cstdio>
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#include <sys/stat.h>
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// PCH reader validator implementation
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//===----------------------------------------------------------------------===//
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PCHReaderListener::~PCHReaderListener() {}
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bool
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PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) {
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const LangOptions &PPLangOpts = PP.getLangOptions();
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#define PARSE_LANGOPT_BENIGN(Option)
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#define PARSE_LANGOPT_IMPORTANT(Option, DiagID) \
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if (PPLangOpts.Option != LangOpts.Option) { \
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Reader.Diag(DiagID) << LangOpts.Option << PPLangOpts.Option; \
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return true; \
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}
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PARSE_LANGOPT_BENIGN(Trigraphs);
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PARSE_LANGOPT_BENIGN(BCPLComment);
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PARSE_LANGOPT_BENIGN(DollarIdents);
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PARSE_LANGOPT_BENIGN(AsmPreprocessor);
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PARSE_LANGOPT_IMPORTANT(GNUMode, diag::warn_pch_gnu_extensions);
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PARSE_LANGOPT_BENIGN(ImplicitInt);
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PARSE_LANGOPT_BENIGN(Digraphs);
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PARSE_LANGOPT_BENIGN(HexFloats);
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PARSE_LANGOPT_IMPORTANT(C99, diag::warn_pch_c99);
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PARSE_LANGOPT_IMPORTANT(Microsoft, diag::warn_pch_microsoft_extensions);
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PARSE_LANGOPT_IMPORTANT(CPlusPlus, diag::warn_pch_cplusplus);
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PARSE_LANGOPT_IMPORTANT(CPlusPlus0x, diag::warn_pch_cplusplus0x);
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PARSE_LANGOPT_BENIGN(CXXOperatorName);
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PARSE_LANGOPT_IMPORTANT(ObjC1, diag::warn_pch_objective_c);
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PARSE_LANGOPT_IMPORTANT(ObjC2, diag::warn_pch_objective_c2);
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PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI, diag::warn_pch_nonfragile_abi);
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PARSE_LANGOPT_BENIGN(PascalStrings);
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PARSE_LANGOPT_BENIGN(WritableStrings);
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PARSE_LANGOPT_IMPORTANT(LaxVectorConversions,
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diag::warn_pch_lax_vector_conversions);
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PARSE_LANGOPT_IMPORTANT(AltiVec, diag::warn_pch_altivec);
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PARSE_LANGOPT_IMPORTANT(Exceptions, diag::warn_pch_exceptions);
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PARSE_LANGOPT_IMPORTANT(NeXTRuntime, diag::warn_pch_objc_runtime);
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PARSE_LANGOPT_IMPORTANT(Freestanding, diag::warn_pch_freestanding);
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PARSE_LANGOPT_IMPORTANT(NoBuiltin, diag::warn_pch_builtins);
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PARSE_LANGOPT_IMPORTANT(ThreadsafeStatics,
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diag::warn_pch_thread_safe_statics);
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PARSE_LANGOPT_IMPORTANT(Blocks, diag::warn_pch_blocks);
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PARSE_LANGOPT_BENIGN(EmitAllDecls);
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PARSE_LANGOPT_IMPORTANT(MathErrno, diag::warn_pch_math_errno);
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PARSE_LANGOPT_IMPORTANT(OverflowChecking, diag::warn_pch_overflow_checking);
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PARSE_LANGOPT_IMPORTANT(HeinousExtensions,
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diag::warn_pch_heinous_extensions);
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// FIXME: Most of the options below are benign if the macro wasn't
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// used. Unfortunately, this means that a PCH compiled without
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// optimization can't be used with optimization turned on, even
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// though the only thing that changes is whether __OPTIMIZE__ was
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// defined... but if __OPTIMIZE__ never showed up in the header, it
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// doesn't matter. We could consider making this some special kind
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// of check.
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PARSE_LANGOPT_IMPORTANT(Optimize, diag::warn_pch_optimize);
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PARSE_LANGOPT_IMPORTANT(OptimizeSize, diag::warn_pch_optimize_size);
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PARSE_LANGOPT_IMPORTANT(Static, diag::warn_pch_static);
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PARSE_LANGOPT_IMPORTANT(PICLevel, diag::warn_pch_pic_level);
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PARSE_LANGOPT_IMPORTANT(GNUInline, diag::warn_pch_gnu_inline);
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PARSE_LANGOPT_IMPORTANT(NoInline, diag::warn_pch_no_inline);
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PARSE_LANGOPT_IMPORTANT(AccessControl, diag::warn_pch_access_control);
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PARSE_LANGOPT_IMPORTANT(CharIsSigned, diag::warn_pch_char_signed);
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if ((PPLangOpts.getGCMode() != 0) != (LangOpts.getGCMode() != 0)) {
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Reader.Diag(diag::warn_pch_gc_mode)
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<< LangOpts.getGCMode() << PPLangOpts.getGCMode();
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return true;
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}
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PARSE_LANGOPT_BENIGN(getVisibilityMode());
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PARSE_LANGOPT_BENIGN(InstantiationDepth);
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PARSE_LANGOPT_IMPORTANT(OpenCL, diag::warn_pch_opencl);
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#undef PARSE_LANGOPT_IRRELEVANT
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#undef PARSE_LANGOPT_BENIGN
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return false;
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}
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bool PCHValidator::ReadTargetTriple(const std::string &Triple) {
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if (Triple != PP.getTargetInfo().getTargetTriple()) {
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Reader.Diag(diag::warn_pch_target_triple)
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<< Triple << PP.getTargetInfo().getTargetTriple();
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return true;
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}
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return false;
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}
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/// \brief Split the given string into a vector of lines, eliminating
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/// any empty lines in the process.
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///
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/// \param Str the string to split.
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/// \param Len the length of Str.
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/// \param KeepEmptyLines true if empty lines should be included
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/// \returns a vector of lines, with the line endings removed
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static std::vector<std::string> splitLines(const char *Str, unsigned Len,
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bool KeepEmptyLines = false) {
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std::vector<std::string> Lines;
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for (unsigned LineStart = 0; LineStart < Len; ++LineStart) {
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unsigned LineEnd = LineStart;
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while (LineEnd < Len && Str[LineEnd] != '\n')
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++LineEnd;
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if (LineStart != LineEnd || KeepEmptyLines)
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Lines.push_back(std::string(&Str[LineStart], &Str[LineEnd]));
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LineStart = LineEnd;
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}
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return Lines;
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}
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/// \brief Determine whether the string Haystack starts with the
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/// substring Needle.
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static bool startsWith(const std::string &Haystack, const char *Needle) {
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for (unsigned I = 0, N = Haystack.size(); Needle[I] != 0; ++I) {
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if (I == N)
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return false;
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if (Haystack[I] != Needle[I])
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return false;
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}
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return true;
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}
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/// \brief Determine whether the string Haystack starts with the
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/// substring Needle.
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static inline bool startsWith(const std::string &Haystack,
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const std::string &Needle) {
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return startsWith(Haystack, Needle.c_str());
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}
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bool PCHValidator::ReadPredefinesBuffer(const char *PCHPredef,
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unsigned PCHPredefLen,
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FileID PCHBufferID,
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std::string &SuggestedPredefines) {
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const char *Predef = PP.getPredefines().c_str();
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unsigned PredefLen = PP.getPredefines().size();
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// If the two predefines buffers compare equal, we're done!
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if (PredefLen == PCHPredefLen &&
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strncmp(Predef, PCHPredef, PCHPredefLen) == 0)
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return false;
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SourceManager &SourceMgr = PP.getSourceManager();
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// The predefines buffers are different. Determine what the
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// differences are, and whether they require us to reject the PCH
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// file.
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std::vector<std::string> CmdLineLines = splitLines(Predef, PredefLen);
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std::vector<std::string> PCHLines = splitLines(PCHPredef, PCHPredefLen);
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// Sort both sets of predefined buffer lines, since
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std::sort(CmdLineLines.begin(), CmdLineLines.end());
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std::sort(PCHLines.begin(), PCHLines.end());
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// Determine which predefines that where used to build the PCH file
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// are missing from the command line.
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std::vector<std::string> MissingPredefines;
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std::set_difference(PCHLines.begin(), PCHLines.end(),
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CmdLineLines.begin(), CmdLineLines.end(),
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std::back_inserter(MissingPredefines));
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bool MissingDefines = false;
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bool ConflictingDefines = false;
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for (unsigned I = 0, N = MissingPredefines.size(); I != N; ++I) {
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const std::string &Missing = MissingPredefines[I];
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if (!startsWith(Missing, "#define ") != 0) {
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Reader.Diag(diag::warn_pch_compiler_options_mismatch);
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return true;
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}
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// This is a macro definition. Determine the name of the macro
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// we're defining.
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std::string::size_type StartOfMacroName = strlen("#define ");
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std::string::size_type EndOfMacroName
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= Missing.find_first_of("( \n\r", StartOfMacroName);
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assert(EndOfMacroName != std::string::npos &&
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"Couldn't find the end of the macro name");
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std::string MacroName = Missing.substr(StartOfMacroName,
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EndOfMacroName - StartOfMacroName);
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// Determine whether this macro was given a different definition
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// on the command line.
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std::string MacroDefStart = "#define " + MacroName;
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std::string::size_type MacroDefLen = MacroDefStart.size();
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std::vector<std::string>::iterator ConflictPos
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= std::lower_bound(CmdLineLines.begin(), CmdLineLines.end(),
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MacroDefStart);
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for (; ConflictPos != CmdLineLines.end(); ++ConflictPos) {
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if (!startsWith(*ConflictPos, MacroDefStart)) {
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// Different macro; we're done.
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ConflictPos = CmdLineLines.end();
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break;
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}
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assert(ConflictPos->size() > MacroDefLen &&
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"Invalid #define in predefines buffer?");
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if ((*ConflictPos)[MacroDefLen] != ' ' &&
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(*ConflictPos)[MacroDefLen] != '(')
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continue; // Longer macro name; keep trying.
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// We found a conflicting macro definition.
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break;
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}
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if (ConflictPos != CmdLineLines.end()) {
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Reader.Diag(diag::warn_cmdline_conflicting_macro_def)
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<< MacroName;
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// Show the definition of this macro within the PCH file.
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const char *MissingDef = strstr(PCHPredef, Missing.c_str());
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unsigned Offset = MissingDef - PCHPredef;
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SourceLocation PCHMissingLoc
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= SourceMgr.getLocForStartOfFile(PCHBufferID)
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.getFileLocWithOffset(Offset);
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Reader.Diag(PCHMissingLoc, diag::note_pch_macro_defined_as)
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<< MacroName;
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ConflictingDefines = true;
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continue;
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}
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// If the macro doesn't conflict, then we'll just pick up the
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// macro definition from the PCH file. Warn the user that they
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// made a mistake.
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if (ConflictingDefines)
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continue; // Don't complain if there are already conflicting defs
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if (!MissingDefines) {
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Reader.Diag(diag::warn_cmdline_missing_macro_defs);
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MissingDefines = true;
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}
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// Show the definition of this macro within the PCH file.
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const char *MissingDef = strstr(PCHPredef, Missing.c_str());
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unsigned Offset = MissingDef - PCHPredef;
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SourceLocation PCHMissingLoc
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= SourceMgr.getLocForStartOfFile(PCHBufferID)
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.getFileLocWithOffset(Offset);
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Reader.Diag(PCHMissingLoc, diag::note_using_macro_def_from_pch);
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}
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if (ConflictingDefines)
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return true;
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// Determine what predefines were introduced based on command-line
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// parameters that were not present when building the PCH
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// file. Extra #defines are okay, so long as the identifiers being
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// defined were not used within the precompiled header.
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std::vector<std::string> ExtraPredefines;
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std::set_difference(CmdLineLines.begin(), CmdLineLines.end(),
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PCHLines.begin(), PCHLines.end(),
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std::back_inserter(ExtraPredefines));
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for (unsigned I = 0, N = ExtraPredefines.size(); I != N; ++I) {
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const std::string &Extra = ExtraPredefines[I];
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if (!startsWith(Extra, "#define ") != 0) {
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Reader.Diag(diag::warn_pch_compiler_options_mismatch);
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return true;
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}
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// This is an extra macro definition. Determine the name of the
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// macro we're defining.
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std::string::size_type StartOfMacroName = strlen("#define ");
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std::string::size_type EndOfMacroName
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= Extra.find_first_of("( \n\r", StartOfMacroName);
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assert(EndOfMacroName != std::string::npos &&
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"Couldn't find the end of the macro name");
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std::string MacroName = Extra.substr(StartOfMacroName,
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EndOfMacroName - StartOfMacroName);
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// Check whether this name was used somewhere in the PCH file. If
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// so, defining it as a macro could change behavior, so we reject
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// the PCH file.
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if (IdentifierInfo *II = Reader.get(MacroName.c_str(),
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MacroName.c_str() + MacroName.size())) {
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Reader.Diag(diag::warn_macro_name_used_in_pch)
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<< II;
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return true;
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}
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// Add this definition to the suggested predefines buffer.
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SuggestedPredefines += Extra;
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SuggestedPredefines += '\n';
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}
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// If we get here, it's because the predefines buffer had compatible
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// contents. Accept the PCH file.
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return false;
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}
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void PCHValidator::ReadHeaderFileInfo(const HeaderFileInfo &HFI) {
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PP.getHeaderSearchInfo().setHeaderFileInfoForUID(HFI, NumHeaderInfos++);
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}
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void PCHValidator::ReadCounter(unsigned Value) {
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PP.setCounterValue(Value);
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}
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//===----------------------------------------------------------------------===//
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// PCH reader implementation
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//===----------------------------------------------------------------------===//
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PCHReader::PCHReader(Preprocessor &PP, ASTContext *Context,
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const char *isysroot)
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: Listener(new PCHValidator(PP, *this)), SourceMgr(PP.getSourceManager()),
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FileMgr(PP.getFileManager()), Diags(PP.getDiagnostics()),
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SemaObj(0), PP(&PP), Context(Context), Consumer(0),
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IdentifierTableData(0), IdentifierLookupTable(0),
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IdentifierOffsets(0),
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MethodPoolLookupTable(0), MethodPoolLookupTableData(0),
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TotalSelectorsInMethodPool(0), SelectorOffsets(0),
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TotalNumSelectors(0), Comments(0), NumComments(0), isysroot(isysroot),
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NumStatHits(0), NumStatMisses(0),
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NumSLocEntriesRead(0), NumStatementsRead(0),
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NumMacrosRead(0), NumMethodPoolSelectorsRead(0), NumMethodPoolMisses(0),
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NumLexicalDeclContextsRead(0), NumVisibleDeclContextsRead(0),
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CurrentlyLoadingTypeOrDecl(0) {
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RelocatablePCH = false;
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}
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PCHReader::PCHReader(SourceManager &SourceMgr, FileManager &FileMgr,
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Diagnostic &Diags, const char *isysroot)
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: SourceMgr(SourceMgr), FileMgr(FileMgr), Diags(Diags),
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SemaObj(0), PP(0), Context(0), Consumer(0),
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IdentifierTableData(0), IdentifierLookupTable(0),
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IdentifierOffsets(0),
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MethodPoolLookupTable(0), MethodPoolLookupTableData(0),
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TotalSelectorsInMethodPool(0), SelectorOffsets(0),
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TotalNumSelectors(0), Comments(0), NumComments(0), isysroot(isysroot),
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NumStatHits(0), NumStatMisses(0),
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NumSLocEntriesRead(0), NumStatementsRead(0),
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NumMacrosRead(0), NumMethodPoolSelectorsRead(0), NumMethodPoolMisses(0),
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NumLexicalDeclContextsRead(0), NumVisibleDeclContextsRead(0),
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CurrentlyLoadingTypeOrDecl(0) {
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RelocatablePCH = false;
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}
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PCHReader::~PCHReader() {}
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Expr *PCHReader::ReadDeclExpr() {
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return dyn_cast_or_null<Expr>(ReadStmt(DeclsCursor));
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}
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Expr *PCHReader::ReadTypeExpr() {
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return dyn_cast_or_null<Expr>(ReadStmt(Stream));
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}
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namespace {
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class VISIBILITY_HIDDEN PCHMethodPoolLookupTrait {
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PCHReader &Reader;
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public:
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typedef std::pair<ObjCMethodList, ObjCMethodList> data_type;
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typedef Selector external_key_type;
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typedef external_key_type internal_key_type;
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explicit PCHMethodPoolLookupTrait(PCHReader &Reader) : Reader(Reader) { }
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static bool EqualKey(const internal_key_type& a,
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const internal_key_type& b) {
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return a == b;
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}
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static unsigned ComputeHash(Selector Sel) {
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unsigned N = Sel.getNumArgs();
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if (N == 0)
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++N;
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unsigned R = 5381;
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for (unsigned I = 0; I != N; ++I)
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if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
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R = clang::BernsteinHashPartial(II->getName(), II->getLength(), R);
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return R;
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}
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// This hopefully will just get inlined and removed by the optimizer.
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static const internal_key_type&
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GetInternalKey(const external_key_type& x) { return x; }
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static std::pair<unsigned, unsigned>
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ReadKeyDataLength(const unsigned char*& d) {
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using namespace clang::io;
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unsigned KeyLen = ReadUnalignedLE16(d);
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unsigned DataLen = ReadUnalignedLE16(d);
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return std::make_pair(KeyLen, DataLen);
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}
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internal_key_type ReadKey(const unsigned char* d, unsigned) {
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using namespace clang::io;
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SelectorTable &SelTable = Reader.getContext()->Selectors;
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unsigned N = ReadUnalignedLE16(d);
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IdentifierInfo *FirstII
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= Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d));
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if (N == 0)
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return SelTable.getNullarySelector(FirstII);
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else if (N == 1)
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return SelTable.getUnarySelector(FirstII);
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llvm::SmallVector<IdentifierInfo *, 16> Args;
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Args.push_back(FirstII);
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for (unsigned I = 1; I != N; ++I)
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Args.push_back(Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d)));
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return SelTable.getSelector(N, Args.data());
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}
|
|
|
|
data_type ReadData(Selector, const unsigned char* d, unsigned DataLen) {
|
|
using namespace clang::io;
|
|
unsigned NumInstanceMethods = ReadUnalignedLE16(d);
|
|
unsigned NumFactoryMethods = ReadUnalignedLE16(d);
|
|
|
|
data_type Result;
|
|
|
|
// Load instance methods
|
|
ObjCMethodList *Prev = 0;
|
|
for (unsigned I = 0; I != NumInstanceMethods; ++I) {
|
|
ObjCMethodDecl *Method
|
|
= cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d)));
|
|
if (!Result.first.Method) {
|
|
// This is the first method, which is the easy case.
|
|
Result.first.Method = Method;
|
|
Prev = &Result.first;
|
|
continue;
|
|
}
|
|
|
|
Prev->Next = new ObjCMethodList(Method, 0);
|
|
Prev = Prev->Next;
|
|
}
|
|
|
|
// Load factory methods
|
|
Prev = 0;
|
|
for (unsigned I = 0; I != NumFactoryMethods; ++I) {
|
|
ObjCMethodDecl *Method
|
|
= cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d)));
|
|
if (!Result.second.Method) {
|
|
// This is the first method, which is the easy case.
|
|
Result.second.Method = Method;
|
|
Prev = &Result.second;
|
|
continue;
|
|
}
|
|
|
|
Prev->Next = new ObjCMethodList(Method, 0);
|
|
Prev = Prev->Next;
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
/// \brief The on-disk hash table used for the global method pool.
|
|
typedef OnDiskChainedHashTable<PCHMethodPoolLookupTrait>
|
|
PCHMethodPoolLookupTable;
|
|
|
|
namespace {
|
|
class VISIBILITY_HIDDEN PCHIdentifierLookupTrait {
|
|
PCHReader &Reader;
|
|
|
|
// If we know the IdentifierInfo in advance, it is here and we will
|
|
// not build a new one. Used when deserializing information about an
|
|
// identifier that was constructed before the PCH file was read.
|
|
IdentifierInfo *KnownII;
|
|
|
|
public:
|
|
typedef IdentifierInfo * data_type;
|
|
|
|
typedef const std::pair<const char*, unsigned> external_key_type;
|
|
|
|
typedef external_key_type internal_key_type;
|
|
|
|
explicit PCHIdentifierLookupTrait(PCHReader &Reader, IdentifierInfo *II = 0)
|
|
: Reader(Reader), KnownII(II) { }
|
|
|
|
static bool EqualKey(const internal_key_type& a,
|
|
const internal_key_type& b) {
|
|
return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0
|
|
: false;
|
|
}
|
|
|
|
static unsigned ComputeHash(const internal_key_type& a) {
|
|
return BernsteinHash(a.first, a.second);
|
|
}
|
|
|
|
// This hopefully will just get inlined and removed by the optimizer.
|
|
static const internal_key_type&
|
|
GetInternalKey(const external_key_type& x) { return x; }
|
|
|
|
static std::pair<unsigned, unsigned>
|
|
ReadKeyDataLength(const unsigned char*& d) {
|
|
using namespace clang::io;
|
|
unsigned DataLen = ReadUnalignedLE16(d);
|
|
unsigned KeyLen = ReadUnalignedLE16(d);
|
|
return std::make_pair(KeyLen, DataLen);
|
|
}
|
|
|
|
static std::pair<const char*, unsigned>
|
|
ReadKey(const unsigned char* d, unsigned n) {
|
|
assert(n >= 2 && d[n-1] == '\0');
|
|
return std::make_pair((const char*) d, n-1);
|
|
}
|
|
|
|
IdentifierInfo *ReadData(const internal_key_type& k,
|
|
const unsigned char* d,
|
|
unsigned DataLen) {
|
|
using namespace clang::io;
|
|
pch::IdentID ID = ReadUnalignedLE32(d);
|
|
bool IsInteresting = ID & 0x01;
|
|
|
|
// Wipe out the "is interesting" bit.
|
|
ID = ID >> 1;
|
|
|
|
if (!IsInteresting) {
|
|
// For unintersting identifiers, just build the IdentifierInfo
|
|
// and associate it with the persistent ID.
|
|
IdentifierInfo *II = KnownII;
|
|
if (!II)
|
|
II = &Reader.getIdentifierTable().CreateIdentifierInfo(
|
|
k.first, k.first + k.second);
|
|
Reader.SetIdentifierInfo(ID, II);
|
|
return II;
|
|
}
|
|
|
|
unsigned Bits = ReadUnalignedLE16(d);
|
|
bool CPlusPlusOperatorKeyword = Bits & 0x01;
|
|
Bits >>= 1;
|
|
bool Poisoned = Bits & 0x01;
|
|
Bits >>= 1;
|
|
bool ExtensionToken = Bits & 0x01;
|
|
Bits >>= 1;
|
|
bool hasMacroDefinition = Bits & 0x01;
|
|
Bits >>= 1;
|
|
unsigned ObjCOrBuiltinID = Bits & 0x3FF;
|
|
Bits >>= 10;
|
|
|
|
assert(Bits == 0 && "Extra bits in the identifier?");
|
|
DataLen -= 6;
|
|
|
|
// Build the IdentifierInfo itself and link the identifier ID with
|
|
// the new IdentifierInfo.
|
|
IdentifierInfo *II = KnownII;
|
|
if (!II)
|
|
II = &Reader.getIdentifierTable().CreateIdentifierInfo(
|
|
k.first, k.first + k.second);
|
|
Reader.SetIdentifierInfo(ID, II);
|
|
|
|
// Set or check the various bits in the IdentifierInfo structure.
|
|
// FIXME: Load token IDs lazily, too?
|
|
II->setObjCOrBuiltinID(ObjCOrBuiltinID);
|
|
assert(II->isExtensionToken() == ExtensionToken &&
|
|
"Incorrect extension token flag");
|
|
(void)ExtensionToken;
|
|
II->setIsPoisoned(Poisoned);
|
|
assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&
|
|
"Incorrect C++ operator keyword flag");
|
|
(void)CPlusPlusOperatorKeyword;
|
|
|
|
// If this identifier is a macro, deserialize the macro
|
|
// definition.
|
|
if (hasMacroDefinition) {
|
|
uint32_t Offset = ReadUnalignedLE32(d);
|
|
Reader.ReadMacroRecord(Offset);
|
|
DataLen -= 4;
|
|
}
|
|
|
|
// Read all of the declarations visible at global scope with this
|
|
// name.
|
|
if (Reader.getContext() == 0) return II;
|
|
if (DataLen > 0) {
|
|
llvm::SmallVector<uint32_t, 4> DeclIDs;
|
|
for (; DataLen > 0; DataLen -= 4)
|
|
DeclIDs.push_back(ReadUnalignedLE32(d));
|
|
Reader.SetGloballyVisibleDecls(II, DeclIDs);
|
|
}
|
|
|
|
return II;
|
|
}
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
/// \brief The on-disk hash table used to contain information about
|
|
/// all of the identifiers in the program.
|
|
typedef OnDiskChainedHashTable<PCHIdentifierLookupTrait>
|
|
PCHIdentifierLookupTable;
|
|
|
|
bool PCHReader::Error(const char *Msg) {
|
|
unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Fatal, Msg);
|
|
Diag(DiagID);
|
|
return true;
|
|
}
|
|
|
|
/// \brief Check the contents of the predefines buffer against the
|
|
/// contents of the predefines buffer used to build the PCH file.
|
|
///
|
|
/// The contents of the two predefines buffers should be the same. If
|
|
/// not, then some command-line option changed the preprocessor state
|
|
/// and we must reject the PCH file.
|
|
///
|
|
/// \param PCHPredef The start of the predefines buffer in the PCH
|
|
/// file.
|
|
///
|
|
/// \param PCHPredefLen The length of the predefines buffer in the PCH
|
|
/// file.
|
|
///
|
|
/// \param PCHBufferID The FileID for the PCH predefines buffer.
|
|
///
|
|
/// \returns true if there was a mismatch (in which case the PCH file
|
|
/// should be ignored), or false otherwise.
|
|
bool PCHReader::CheckPredefinesBuffer(const char *PCHPredef,
|
|
unsigned PCHPredefLen,
|
|
FileID PCHBufferID) {
|
|
if (Listener)
|
|
return Listener->ReadPredefinesBuffer(PCHPredef, PCHPredefLen, PCHBufferID,
|
|
SuggestedPredefines);
|
|
return false;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Source Manager Deserialization
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// \brief Read the line table in the source manager block.
|
|
/// \returns true if ther was an error.
|
|
bool PCHReader::ParseLineTable(llvm::SmallVectorImpl<uint64_t> &Record) {
|
|
unsigned Idx = 0;
|
|
LineTableInfo &LineTable = SourceMgr.getLineTable();
|
|
|
|
// Parse the file names
|
|
std::map<int, int> FileIDs;
|
|
for (int I = 0, N = Record[Idx++]; I != N; ++I) {
|
|
// Extract the file name
|
|
unsigned FilenameLen = Record[Idx++];
|
|
std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen);
|
|
Idx += FilenameLen;
|
|
MaybeAddSystemRootToFilename(Filename);
|
|
FileIDs[I] = LineTable.getLineTableFilenameID(Filename.c_str(),
|
|
Filename.size());
|
|
}
|
|
|
|
// Parse the line entries
|
|
std::vector<LineEntry> Entries;
|
|
while (Idx < Record.size()) {
|
|
int FID = FileIDs[Record[Idx++]];
|
|
|
|
// Extract the line entries
|
|
unsigned NumEntries = Record[Idx++];
|
|
Entries.clear();
|
|
Entries.reserve(NumEntries);
|
|
for (unsigned I = 0; I != NumEntries; ++I) {
|
|
unsigned FileOffset = Record[Idx++];
|
|
unsigned LineNo = Record[Idx++];
|
|
int FilenameID = Record[Idx++];
|
|
SrcMgr::CharacteristicKind FileKind
|
|
= (SrcMgr::CharacteristicKind)Record[Idx++];
|
|
unsigned IncludeOffset = Record[Idx++];
|
|
Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
|
|
FileKind, IncludeOffset));
|
|
}
|
|
LineTable.AddEntry(FID, Entries);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
namespace {
|
|
|
|
class VISIBILITY_HIDDEN PCHStatData {
|
|
public:
|
|
const bool hasStat;
|
|
const ino_t ino;
|
|
const dev_t dev;
|
|
const mode_t mode;
|
|
const time_t mtime;
|
|
const off_t size;
|
|
|
|
PCHStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s)
|
|
: hasStat(true), ino(i), dev(d), mode(mo), mtime(m), size(s) {}
|
|
|
|
PCHStatData()
|
|
: hasStat(false), ino(0), dev(0), mode(0), mtime(0), size(0) {}
|
|
};
|
|
|
|
class VISIBILITY_HIDDEN PCHStatLookupTrait {
|
|
public:
|
|
typedef const char *external_key_type;
|
|
typedef const char *internal_key_type;
|
|
|
|
typedef PCHStatData data_type;
|
|
|
|
static unsigned ComputeHash(const char *path) {
|
|
return BernsteinHash(path);
|
|
}
|
|
|
|
static internal_key_type GetInternalKey(const char *path) { return path; }
|
|
|
|
static bool EqualKey(internal_key_type a, internal_key_type b) {
|
|
return strcmp(a, b) == 0;
|
|
}
|
|
|
|
static std::pair<unsigned, unsigned>
|
|
ReadKeyDataLength(const unsigned char*& d) {
|
|
unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d);
|
|
unsigned DataLen = (unsigned) *d++;
|
|
return std::make_pair(KeyLen + 1, DataLen);
|
|
}
|
|
|
|
static internal_key_type ReadKey(const unsigned char *d, unsigned) {
|
|
return (const char *)d;
|
|
}
|
|
|
|
static data_type ReadData(const internal_key_type, const unsigned char *d,
|
|
unsigned /*DataLen*/) {
|
|
using namespace clang::io;
|
|
|
|
if (*d++ == 1)
|
|
return data_type();
|
|
|
|
ino_t ino = (ino_t) ReadUnalignedLE32(d);
|
|
dev_t dev = (dev_t) ReadUnalignedLE32(d);
|
|
mode_t mode = (mode_t) ReadUnalignedLE16(d);
|
|
time_t mtime = (time_t) ReadUnalignedLE64(d);
|
|
off_t size = (off_t) ReadUnalignedLE64(d);
|
|
return data_type(ino, dev, mode, mtime, size);
|
|
}
|
|
};
|
|
|
|
/// \brief stat() cache for precompiled headers.
|
|
///
|
|
/// This cache is very similar to the stat cache used by pretokenized
|
|
/// headers.
|
|
class VISIBILITY_HIDDEN PCHStatCache : public StatSysCallCache {
|
|
typedef OnDiskChainedHashTable<PCHStatLookupTrait> CacheTy;
|
|
CacheTy *Cache;
|
|
|
|
unsigned &NumStatHits, &NumStatMisses;
|
|
public:
|
|
PCHStatCache(const unsigned char *Buckets,
|
|
const unsigned char *Base,
|
|
unsigned &NumStatHits,
|
|
unsigned &NumStatMisses)
|
|
: Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) {
|
|
Cache = CacheTy::Create(Buckets, Base);
|
|
}
|
|
|
|
~PCHStatCache() { delete Cache; }
|
|
|
|
int stat(const char *path, struct stat *buf) {
|
|
// Do the lookup for the file's data in the PCH file.
|
|
CacheTy::iterator I = Cache->find(path);
|
|
|
|
// If we don't get a hit in the PCH file just forward to 'stat'.
|
|
if (I == Cache->end()) {
|
|
++NumStatMisses;
|
|
return ::stat(path, buf);
|
|
}
|
|
|
|
++NumStatHits;
|
|
PCHStatData Data = *I;
|
|
|
|
if (!Data.hasStat)
|
|
return 1;
|
|
|
|
buf->st_ino = Data.ino;
|
|
buf->st_dev = Data.dev;
|
|
buf->st_mtime = Data.mtime;
|
|
buf->st_mode = Data.mode;
|
|
buf->st_size = Data.size;
|
|
return 0;
|
|
}
|
|
};
|
|
} // end anonymous namespace
|
|
|
|
|
|
/// \brief Read the source manager block
|
|
PCHReader::PCHReadResult PCHReader::ReadSourceManagerBlock() {
|
|
using namespace SrcMgr;
|
|
|
|
// Set the source-location entry cursor to the current position in
|
|
// the stream. This cursor will be used to read the contents of the
|
|
// source manager block initially, and then lazily read
|
|
// source-location entries as needed.
|
|
SLocEntryCursor = Stream;
|
|
|
|
// The stream itself is going to skip over the source manager block.
|
|
if (Stream.SkipBlock()) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
// Enter the source manager block.
|
|
if (SLocEntryCursor.EnterSubBlock(pch::SOURCE_MANAGER_BLOCK_ID)) {
|
|
Error("malformed source manager block record in PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
RecordData Record;
|
|
while (true) {
|
|
unsigned Code = SLocEntryCursor.ReadCode();
|
|
if (Code == llvm::bitc::END_BLOCK) {
|
|
if (SLocEntryCursor.ReadBlockEnd()) {
|
|
Error("error at end of Source Manager block in PCH file");
|
|
return Failure;
|
|
}
|
|
return Success;
|
|
}
|
|
|
|
if (Code == llvm::bitc::ENTER_SUBBLOCK) {
|
|
// No known subblocks, always skip them.
|
|
SLocEntryCursor.ReadSubBlockID();
|
|
if (SLocEntryCursor.SkipBlock()) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (Code == llvm::bitc::DEFINE_ABBREV) {
|
|
SLocEntryCursor.ReadAbbrevRecord();
|
|
continue;
|
|
}
|
|
|
|
// Read a record.
|
|
const char *BlobStart;
|
|
unsigned BlobLen;
|
|
Record.clear();
|
|
switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) {
|
|
default: // Default behavior: ignore.
|
|
break;
|
|
|
|
case pch::SM_LINE_TABLE:
|
|
if (ParseLineTable(Record))
|
|
return Failure;
|
|
break;
|
|
|
|
case pch::SM_HEADER_FILE_INFO: {
|
|
HeaderFileInfo HFI;
|
|
HFI.isImport = Record[0];
|
|
HFI.DirInfo = Record[1];
|
|
HFI.NumIncludes = Record[2];
|
|
HFI.ControllingMacroID = Record[3];
|
|
if (Listener)
|
|
Listener->ReadHeaderFileInfo(HFI);
|
|
break;
|
|
}
|
|
|
|
case pch::SM_SLOC_FILE_ENTRY:
|
|
case pch::SM_SLOC_BUFFER_ENTRY:
|
|
case pch::SM_SLOC_INSTANTIATION_ENTRY:
|
|
// Once we hit one of the source location entries, we're done.
|
|
return Success;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// \brief Read in the source location entry with the given ID.
|
|
PCHReader::PCHReadResult PCHReader::ReadSLocEntryRecord(unsigned ID) {
|
|
if (ID == 0)
|
|
return Success;
|
|
|
|
if (ID > TotalNumSLocEntries) {
|
|
Error("source location entry ID out-of-range for PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
++NumSLocEntriesRead;
|
|
SLocEntryCursor.JumpToBit(SLocOffsets[ID - 1]);
|
|
unsigned Code = SLocEntryCursor.ReadCode();
|
|
if (Code == llvm::bitc::END_BLOCK ||
|
|
Code == llvm::bitc::ENTER_SUBBLOCK ||
|
|
Code == llvm::bitc::DEFINE_ABBREV) {
|
|
Error("incorrectly-formatted source location entry in PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
RecordData Record;
|
|
const char *BlobStart;
|
|
unsigned BlobLen;
|
|
switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) {
|
|
default:
|
|
Error("incorrectly-formatted source location entry in PCH file");
|
|
return Failure;
|
|
|
|
case pch::SM_SLOC_FILE_ENTRY: {
|
|
std::string Filename(BlobStart, BlobStart + BlobLen);
|
|
MaybeAddSystemRootToFilename(Filename);
|
|
const FileEntry *File = FileMgr.getFile(Filename);
|
|
if (File == 0) {
|
|
std::string ErrorStr = "could not find file '";
|
|
ErrorStr += Filename;
|
|
ErrorStr += "' referenced by PCH file";
|
|
Error(ErrorStr.c_str());
|
|
return Failure;
|
|
}
|
|
|
|
FileID FID = SourceMgr.createFileID(File,
|
|
SourceLocation::getFromRawEncoding(Record[1]),
|
|
(SrcMgr::CharacteristicKind)Record[2],
|
|
ID, Record[0]);
|
|
if (Record[3])
|
|
const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile())
|
|
.setHasLineDirectives();
|
|
|
|
break;
|
|
}
|
|
|
|
case pch::SM_SLOC_BUFFER_ENTRY: {
|
|
const char *Name = BlobStart;
|
|
unsigned Offset = Record[0];
|
|
unsigned Code = SLocEntryCursor.ReadCode();
|
|
Record.clear();
|
|
unsigned RecCode
|
|
= SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen);
|
|
assert(RecCode == pch::SM_SLOC_BUFFER_BLOB && "Ill-formed PCH file");
|
|
(void)RecCode;
|
|
llvm::MemoryBuffer *Buffer
|
|
= llvm::MemoryBuffer::getMemBuffer(BlobStart,
|
|
BlobStart + BlobLen - 1,
|
|
Name);
|
|
FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, Offset);
|
|
|
|
if (strcmp(Name, "<built-in>") == 0) {
|
|
PCHPredefinesBufferID = BufferID;
|
|
PCHPredefines = BlobStart;
|
|
PCHPredefinesLen = BlobLen - 1;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case pch::SM_SLOC_INSTANTIATION_ENTRY: {
|
|
SourceLocation SpellingLoc
|
|
= SourceLocation::getFromRawEncoding(Record[1]);
|
|
SourceMgr.createInstantiationLoc(SpellingLoc,
|
|
SourceLocation::getFromRawEncoding(Record[2]),
|
|
SourceLocation::getFromRawEncoding(Record[3]),
|
|
Record[4],
|
|
ID,
|
|
Record[0]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return Success;
|
|
}
|
|
|
|
/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the
|
|
/// specified cursor. Read the abbreviations that are at the top of the block
|
|
/// and then leave the cursor pointing into the block.
|
|
bool PCHReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor,
|
|
unsigned BlockID) {
|
|
if (Cursor.EnterSubBlock(BlockID)) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
while (true) {
|
|
unsigned Code = Cursor.ReadCode();
|
|
|
|
// We expect all abbrevs to be at the start of the block.
|
|
if (Code != llvm::bitc::DEFINE_ABBREV)
|
|
return false;
|
|
Cursor.ReadAbbrevRecord();
|
|
}
|
|
}
|
|
|
|
void PCHReader::ReadMacroRecord(uint64_t Offset) {
|
|
assert(PP && "Forgot to set Preprocessor ?");
|
|
|
|
// Keep track of where we are in the stream, then jump back there
|
|
// after reading this macro.
|
|
SavedStreamPosition SavedPosition(Stream);
|
|
|
|
Stream.JumpToBit(Offset);
|
|
RecordData Record;
|
|
llvm::SmallVector<IdentifierInfo*, 16> MacroArgs;
|
|
MacroInfo *Macro = 0;
|
|
|
|
while (true) {
|
|
unsigned Code = Stream.ReadCode();
|
|
switch (Code) {
|
|
case llvm::bitc::END_BLOCK:
|
|
return;
|
|
|
|
case llvm::bitc::ENTER_SUBBLOCK:
|
|
// No known subblocks, always skip them.
|
|
Stream.ReadSubBlockID();
|
|
if (Stream.SkipBlock()) {
|
|
Error("malformed block record in PCH file");
|
|
return;
|
|
}
|
|
continue;
|
|
|
|
case llvm::bitc::DEFINE_ABBREV:
|
|
Stream.ReadAbbrevRecord();
|
|
continue;
|
|
default: break;
|
|
}
|
|
|
|
// Read a record.
|
|
Record.clear();
|
|
pch::PreprocessorRecordTypes RecType =
|
|
(pch::PreprocessorRecordTypes)Stream.ReadRecord(Code, Record);
|
|
switch (RecType) {
|
|
case pch::PP_MACRO_OBJECT_LIKE:
|
|
case pch::PP_MACRO_FUNCTION_LIKE: {
|
|
// If we already have a macro, that means that we've hit the end
|
|
// of the definition of the macro we were looking for. We're
|
|
// done.
|
|
if (Macro)
|
|
return;
|
|
|
|
IdentifierInfo *II = DecodeIdentifierInfo(Record[0]);
|
|
if (II == 0) {
|
|
Error("macro must have a name in PCH file");
|
|
return;
|
|
}
|
|
SourceLocation Loc = SourceLocation::getFromRawEncoding(Record[1]);
|
|
bool isUsed = Record[2];
|
|
|
|
MacroInfo *MI = PP->AllocateMacroInfo(Loc);
|
|
MI->setIsUsed(isUsed);
|
|
|
|
if (RecType == pch::PP_MACRO_FUNCTION_LIKE) {
|
|
// Decode function-like macro info.
|
|
bool isC99VarArgs = Record[3];
|
|
bool isGNUVarArgs = Record[4];
|
|
MacroArgs.clear();
|
|
unsigned NumArgs = Record[5];
|
|
for (unsigned i = 0; i != NumArgs; ++i)
|
|
MacroArgs.push_back(DecodeIdentifierInfo(Record[6+i]));
|
|
|
|
// Install function-like macro info.
|
|
MI->setIsFunctionLike();
|
|
if (isC99VarArgs) MI->setIsC99Varargs();
|
|
if (isGNUVarArgs) MI->setIsGNUVarargs();
|
|
MI->setArgumentList(MacroArgs.data(), MacroArgs.size(),
|
|
PP->getPreprocessorAllocator());
|
|
}
|
|
|
|
// Finally, install the macro.
|
|
PP->setMacroInfo(II, MI);
|
|
|
|
// Remember that we saw this macro last so that we add the tokens that
|
|
// form its body to it.
|
|
Macro = MI;
|
|
++NumMacrosRead;
|
|
break;
|
|
}
|
|
|
|
case pch::PP_TOKEN: {
|
|
// If we see a TOKEN before a PP_MACRO_*, then the file is
|
|
// erroneous, just pretend we didn't see this.
|
|
if (Macro == 0) break;
|
|
|
|
Token Tok;
|
|
Tok.startToken();
|
|
Tok.setLocation(SourceLocation::getFromRawEncoding(Record[0]));
|
|
Tok.setLength(Record[1]);
|
|
if (IdentifierInfo *II = DecodeIdentifierInfo(Record[2]))
|
|
Tok.setIdentifierInfo(II);
|
|
Tok.setKind((tok::TokenKind)Record[3]);
|
|
Tok.setFlag((Token::TokenFlags)Record[4]);
|
|
Macro->AddTokenToBody(Tok);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// \brief If we are loading a relocatable PCH file, and the filename is
|
|
/// not an absolute path, add the system root to the beginning of the file
|
|
/// name.
|
|
void PCHReader::MaybeAddSystemRootToFilename(std::string &Filename) {
|
|
// If this is not a relocatable PCH file, there's nothing to do.
|
|
if (!RelocatablePCH)
|
|
return;
|
|
|
|
if (Filename.empty() || Filename[0] == '/' || Filename[0] == '<')
|
|
return;
|
|
|
|
std::string FIXME = Filename;
|
|
|
|
if (isysroot == 0) {
|
|
// If no system root was given, default to '/'
|
|
Filename.insert(Filename.begin(), '/');
|
|
return;
|
|
}
|
|
|
|
unsigned Length = strlen(isysroot);
|
|
if (isysroot[Length - 1] != '/')
|
|
Filename.insert(Filename.begin(), '/');
|
|
|
|
Filename.insert(Filename.begin(), isysroot, isysroot + Length);
|
|
}
|
|
|
|
PCHReader::PCHReadResult
|
|
PCHReader::ReadPCHBlock() {
|
|
if (Stream.EnterSubBlock(pch::PCH_BLOCK_ID)) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
// Read all of the records and blocks for the PCH file.
|
|
RecordData Record;
|
|
while (!Stream.AtEndOfStream()) {
|
|
unsigned Code = Stream.ReadCode();
|
|
if (Code == llvm::bitc::END_BLOCK) {
|
|
if (Stream.ReadBlockEnd()) {
|
|
Error("error at end of module block in PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
return Success;
|
|
}
|
|
|
|
if (Code == llvm::bitc::ENTER_SUBBLOCK) {
|
|
switch (Stream.ReadSubBlockID()) {
|
|
case pch::TYPES_BLOCK_ID: // Skip types block (lazily loaded)
|
|
default: // Skip unknown content.
|
|
if (Stream.SkipBlock()) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
break;
|
|
|
|
case pch::DECLS_BLOCK_ID:
|
|
// We lazily load the decls block, but we want to set up the
|
|
// DeclsCursor cursor to point into it. Clone our current bitcode
|
|
// cursor to it, enter the block and read the abbrevs in that block.
|
|
// With the main cursor, we just skip over it.
|
|
DeclsCursor = Stream;
|
|
if (Stream.SkipBlock() || // Skip with the main cursor.
|
|
// Read the abbrevs.
|
|
ReadBlockAbbrevs(DeclsCursor, pch::DECLS_BLOCK_ID)) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
break;
|
|
|
|
case pch::PREPROCESSOR_BLOCK_ID:
|
|
if (Stream.SkipBlock()) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
break;
|
|
|
|
case pch::SOURCE_MANAGER_BLOCK_ID:
|
|
switch (ReadSourceManagerBlock()) {
|
|
case Success:
|
|
break;
|
|
|
|
case Failure:
|
|
Error("malformed source manager block in PCH file");
|
|
return Failure;
|
|
|
|
case IgnorePCH:
|
|
return IgnorePCH;
|
|
}
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (Code == llvm::bitc::DEFINE_ABBREV) {
|
|
Stream.ReadAbbrevRecord();
|
|
continue;
|
|
}
|
|
|
|
// Read and process a record.
|
|
Record.clear();
|
|
const char *BlobStart = 0;
|
|
unsigned BlobLen = 0;
|
|
switch ((pch::PCHRecordTypes)Stream.ReadRecord(Code, Record,
|
|
&BlobStart, &BlobLen)) {
|
|
default: // Default behavior: ignore.
|
|
break;
|
|
|
|
case pch::TYPE_OFFSET:
|
|
if (!TypesLoaded.empty()) {
|
|
Error("duplicate TYPE_OFFSET record in PCH file");
|
|
return Failure;
|
|
}
|
|
TypeOffsets = (const uint32_t *)BlobStart;
|
|
TypesLoaded.resize(Record[0]);
|
|
break;
|
|
|
|
case pch::DECL_OFFSET:
|
|
if (!DeclsLoaded.empty()) {
|
|
Error("duplicate DECL_OFFSET record in PCH file");
|
|
return Failure;
|
|
}
|
|
DeclOffsets = (const uint32_t *)BlobStart;
|
|
DeclsLoaded.resize(Record[0]);
|
|
break;
|
|
|
|
case pch::LANGUAGE_OPTIONS:
|
|
if (ParseLanguageOptions(Record))
|
|
return IgnorePCH;
|
|
break;
|
|
|
|
case pch::METADATA: {
|
|
if (Record[0] != pch::VERSION_MAJOR) {
|
|
Diag(Record[0] < pch::VERSION_MAJOR? diag::warn_pch_version_too_old
|
|
: diag::warn_pch_version_too_new);
|
|
return IgnorePCH;
|
|
}
|
|
|
|
RelocatablePCH = Record[4];
|
|
if (Listener) {
|
|
std::string TargetTriple(BlobStart, BlobLen);
|
|
if (Listener->ReadTargetTriple(TargetTriple))
|
|
return IgnorePCH;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case pch::IDENTIFIER_TABLE:
|
|
IdentifierTableData = BlobStart;
|
|
if (Record[0]) {
|
|
IdentifierLookupTable
|
|
= PCHIdentifierLookupTable::Create(
|
|
(const unsigned char *)IdentifierTableData + Record[0],
|
|
(const unsigned char *)IdentifierTableData,
|
|
PCHIdentifierLookupTrait(*this));
|
|
if (PP)
|
|
PP->getIdentifierTable().setExternalIdentifierLookup(this);
|
|
}
|
|
break;
|
|
|
|
case pch::IDENTIFIER_OFFSET:
|
|
if (!IdentifiersLoaded.empty()) {
|
|
Error("duplicate IDENTIFIER_OFFSET record in PCH file");
|
|
return Failure;
|
|
}
|
|
IdentifierOffsets = (const uint32_t *)BlobStart;
|
|
IdentifiersLoaded.resize(Record[0]);
|
|
if (PP)
|
|
PP->getHeaderSearchInfo().SetExternalLookup(this);
|
|
break;
|
|
|
|
case pch::EXTERNAL_DEFINITIONS:
|
|
if (!ExternalDefinitions.empty()) {
|
|
Error("duplicate EXTERNAL_DEFINITIONS record in PCH file");
|
|
return Failure;
|
|
}
|
|
ExternalDefinitions.swap(Record);
|
|
break;
|
|
|
|
case pch::SPECIAL_TYPES:
|
|
SpecialTypes.swap(Record);
|
|
break;
|
|
|
|
case pch::STATISTICS:
|
|
TotalNumStatements = Record[0];
|
|
TotalNumMacros = Record[1];
|
|
TotalLexicalDeclContexts = Record[2];
|
|
TotalVisibleDeclContexts = Record[3];
|
|
break;
|
|
|
|
case pch::TENTATIVE_DEFINITIONS:
|
|
if (!TentativeDefinitions.empty()) {
|
|
Error("duplicate TENTATIVE_DEFINITIONS record in PCH file");
|
|
return Failure;
|
|
}
|
|
TentativeDefinitions.swap(Record);
|
|
break;
|
|
|
|
case pch::LOCALLY_SCOPED_EXTERNAL_DECLS:
|
|
if (!LocallyScopedExternalDecls.empty()) {
|
|
Error("duplicate LOCALLY_SCOPED_EXTERNAL_DECLS record in PCH file");
|
|
return Failure;
|
|
}
|
|
LocallyScopedExternalDecls.swap(Record);
|
|
break;
|
|
|
|
case pch::SELECTOR_OFFSETS:
|
|
SelectorOffsets = (const uint32_t *)BlobStart;
|
|
TotalNumSelectors = Record[0];
|
|
SelectorsLoaded.resize(TotalNumSelectors);
|
|
break;
|
|
|
|
case pch::METHOD_POOL:
|
|
MethodPoolLookupTableData = (const unsigned char *)BlobStart;
|
|
if (Record[0])
|
|
MethodPoolLookupTable
|
|
= PCHMethodPoolLookupTable::Create(
|
|
MethodPoolLookupTableData + Record[0],
|
|
MethodPoolLookupTableData,
|
|
PCHMethodPoolLookupTrait(*this));
|
|
TotalSelectorsInMethodPool = Record[1];
|
|
break;
|
|
|
|
case pch::PP_COUNTER_VALUE:
|
|
if (!Record.empty() && Listener)
|
|
Listener->ReadCounter(Record[0]);
|
|
break;
|
|
|
|
case pch::SOURCE_LOCATION_OFFSETS:
|
|
SLocOffsets = (const uint32_t *)BlobStart;
|
|
TotalNumSLocEntries = Record[0];
|
|
SourceMgr.PreallocateSLocEntries(this,
|
|
TotalNumSLocEntries,
|
|
Record[1]);
|
|
break;
|
|
|
|
case pch::SOURCE_LOCATION_PRELOADS:
|
|
for (unsigned I = 0, N = Record.size(); I != N; ++I) {
|
|
PCHReadResult Result = ReadSLocEntryRecord(Record[I]);
|
|
if (Result != Success)
|
|
return Result;
|
|
}
|
|
break;
|
|
|
|
case pch::STAT_CACHE:
|
|
FileMgr.setStatCache(
|
|
new PCHStatCache((const unsigned char *)BlobStart + Record[0],
|
|
(const unsigned char *)BlobStart,
|
|
NumStatHits, NumStatMisses));
|
|
break;
|
|
|
|
case pch::EXT_VECTOR_DECLS:
|
|
if (!ExtVectorDecls.empty()) {
|
|
Error("duplicate EXT_VECTOR_DECLS record in PCH file");
|
|
return Failure;
|
|
}
|
|
ExtVectorDecls.swap(Record);
|
|
break;
|
|
|
|
case pch::OBJC_CATEGORY_IMPLEMENTATIONS:
|
|
if (!ObjCCategoryImpls.empty()) {
|
|
Error("duplicate OBJC_CATEGORY_IMPLEMENTATIONS record in PCH file");
|
|
return Failure;
|
|
}
|
|
ObjCCategoryImpls.swap(Record);
|
|
break;
|
|
|
|
case pch::ORIGINAL_FILE_NAME:
|
|
OriginalFileName.assign(BlobStart, BlobLen);
|
|
MaybeAddSystemRootToFilename(OriginalFileName);
|
|
break;
|
|
|
|
case pch::COMMENT_RANGES:
|
|
Comments = (SourceRange *)BlobStart;
|
|
NumComments = BlobLen / sizeof(SourceRange);
|
|
break;
|
|
}
|
|
}
|
|
Error("premature end of bitstream in PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
PCHReader::PCHReadResult PCHReader::ReadPCH(const std::string &FileName) {
|
|
// Set the PCH file name.
|
|
this->FileName = FileName;
|
|
|
|
// Open the PCH file.
|
|
std::string ErrStr;
|
|
Buffer.reset(llvm::MemoryBuffer::getFile(FileName.c_str(), &ErrStr));
|
|
if (!Buffer) {
|
|
Error(ErrStr.c_str());
|
|
return IgnorePCH;
|
|
}
|
|
|
|
// Initialize the stream
|
|
StreamFile.init((const unsigned char *)Buffer->getBufferStart(),
|
|
(const unsigned char *)Buffer->getBufferEnd());
|
|
Stream.init(StreamFile);
|
|
|
|
// Sniff for the signature.
|
|
if (Stream.Read(8) != 'C' ||
|
|
Stream.Read(8) != 'P' ||
|
|
Stream.Read(8) != 'C' ||
|
|
Stream.Read(8) != 'H') {
|
|
Diag(diag::err_not_a_pch_file) << FileName;
|
|
return Failure;
|
|
}
|
|
|
|
while (!Stream.AtEndOfStream()) {
|
|
unsigned Code = Stream.ReadCode();
|
|
|
|
if (Code != llvm::bitc::ENTER_SUBBLOCK) {
|
|
Error("invalid record at top-level of PCH file");
|
|
return Failure;
|
|
}
|
|
|
|
unsigned BlockID = Stream.ReadSubBlockID();
|
|
|
|
// We only know the PCH subblock ID.
|
|
switch (BlockID) {
|
|
case llvm::bitc::BLOCKINFO_BLOCK_ID:
|
|
if (Stream.ReadBlockInfoBlock()) {
|
|
Error("malformed BlockInfoBlock in PCH file");
|
|
return Failure;
|
|
}
|
|
break;
|
|
case pch::PCH_BLOCK_ID:
|
|
switch (ReadPCHBlock()) {
|
|
case Success:
|
|
break;
|
|
|
|
case Failure:
|
|
return Failure;
|
|
|
|
case IgnorePCH:
|
|
// FIXME: We could consider reading through to the end of this
|
|
// PCH block, skipping subblocks, to see if there are other
|
|
// PCH blocks elsewhere.
|
|
|
|
// Clear out any preallocated source location entries, so that
|
|
// the source manager does not try to resolve them later.
|
|
SourceMgr.ClearPreallocatedSLocEntries();
|
|
|
|
// Remove the stat cache.
|
|
FileMgr.setStatCache(0);
|
|
|
|
return IgnorePCH;
|
|
}
|
|
break;
|
|
default:
|
|
if (Stream.SkipBlock()) {
|
|
Error("malformed block record in PCH file");
|
|
return Failure;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Check the predefines buffer.
|
|
if (CheckPredefinesBuffer(PCHPredefines, PCHPredefinesLen,
|
|
PCHPredefinesBufferID))
|
|
return IgnorePCH;
|
|
|
|
if (PP) {
|
|
// Initialization of keywords and pragmas occurs before the
|
|
// PCH file is read, so there may be some identifiers that were
|
|
// loaded into the IdentifierTable before we intercepted the
|
|
// creation of identifiers. Iterate through the list of known
|
|
// identifiers and determine whether we have to establish
|
|
// preprocessor definitions or top-level identifier declaration
|
|
// chains for those identifiers.
|
|
//
|
|
// We copy the IdentifierInfo pointers to a small vector first,
|
|
// since de-serializing declarations or macro definitions can add
|
|
// new entries into the identifier table, invalidating the
|
|
// iterators.
|
|
llvm::SmallVector<IdentifierInfo *, 128> Identifiers;
|
|
for (IdentifierTable::iterator Id = PP->getIdentifierTable().begin(),
|
|
IdEnd = PP->getIdentifierTable().end();
|
|
Id != IdEnd; ++Id)
|
|
Identifiers.push_back(Id->second);
|
|
PCHIdentifierLookupTable *IdTable
|
|
= (PCHIdentifierLookupTable *)IdentifierLookupTable;
|
|
for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) {
|
|
IdentifierInfo *II = Identifiers[I];
|
|
// Look in the on-disk hash table for an entry for
|
|
PCHIdentifierLookupTrait Info(*this, II);
|
|
std::pair<const char*, unsigned> Key(II->getName(), II->getLength());
|
|
PCHIdentifierLookupTable::iterator Pos = IdTable->find(Key, &Info);
|
|
if (Pos == IdTable->end())
|
|
continue;
|
|
|
|
// Dereferencing the iterator has the effect of populating the
|
|
// IdentifierInfo node with the various declarations it needs.
|
|
(void)*Pos;
|
|
}
|
|
}
|
|
|
|
if (Context)
|
|
InitializeContext(*Context);
|
|
|
|
return Success;
|
|
}
|
|
|
|
void PCHReader::InitializeContext(ASTContext &Ctx) {
|
|
Context = &Ctx;
|
|
assert(Context && "Passed null context!");
|
|
|
|
assert(PP && "Forgot to set Preprocessor ?");
|
|
PP->getIdentifierTable().setExternalIdentifierLookup(this);
|
|
PP->getHeaderSearchInfo().SetExternalLookup(this);
|
|
|
|
// Load the translation unit declaration
|
|
ReadDeclRecord(DeclOffsets[0], 0);
|
|
|
|
// Load the special types.
|
|
Context->setBuiltinVaListType(
|
|
GetType(SpecialTypes[pch::SPECIAL_TYPE_BUILTIN_VA_LIST]));
|
|
if (unsigned Id = SpecialTypes[pch::SPECIAL_TYPE_OBJC_ID])
|
|
Context->setObjCIdType(GetType(Id));
|
|
if (unsigned Sel = SpecialTypes[pch::SPECIAL_TYPE_OBJC_SELECTOR])
|
|
Context->setObjCSelType(GetType(Sel));
|
|
if (unsigned Proto = SpecialTypes[pch::SPECIAL_TYPE_OBJC_PROTOCOL])
|
|
Context->setObjCProtoType(GetType(Proto));
|
|
if (unsigned Class = SpecialTypes[pch::SPECIAL_TYPE_OBJC_CLASS])
|
|
Context->setObjCClassType(GetType(Class));
|
|
|
|
if (unsigned String = SpecialTypes[pch::SPECIAL_TYPE_CF_CONSTANT_STRING])
|
|
Context->setCFConstantStringType(GetType(String));
|
|
if (unsigned FastEnum
|
|
= SpecialTypes[pch::SPECIAL_TYPE_OBJC_FAST_ENUMERATION_STATE])
|
|
Context->setObjCFastEnumerationStateType(GetType(FastEnum));
|
|
if (unsigned File = SpecialTypes[pch::SPECIAL_TYPE_FILE]) {
|
|
QualType FileType = GetType(File);
|
|
assert(!FileType.isNull() && "FILE type is NULL");
|
|
if (const TypedefType *Typedef = FileType->getAsTypedefType())
|
|
Context->setFILEDecl(Typedef->getDecl());
|
|
else {
|
|
const TagType *Tag = FileType->getAsTagType();
|
|
assert(Tag && "Invalid FILE type in PCH file");
|
|
Context->setFILEDecl(Tag->getDecl());
|
|
}
|
|
}
|
|
}
|
|
|
|
/// \brief Retrieve the name of the original source file name
|
|
/// directly from the PCH file, without actually loading the PCH
|
|
/// file.
|
|
std::string PCHReader::getOriginalSourceFile(const std::string &PCHFileName) {
|
|
// Open the PCH file.
|
|
std::string ErrStr;
|
|
llvm::OwningPtr<llvm::MemoryBuffer> Buffer;
|
|
Buffer.reset(llvm::MemoryBuffer::getFile(PCHFileName.c_str(), &ErrStr));
|
|
if (!Buffer) {
|
|
fprintf(stderr, "error: %s\n", ErrStr.c_str());
|
|
return std::string();
|
|
}
|
|
|
|
// Initialize the stream
|
|
llvm::BitstreamReader StreamFile;
|
|
llvm::BitstreamCursor Stream;
|
|
StreamFile.init((const unsigned char *)Buffer->getBufferStart(),
|
|
(const unsigned char *)Buffer->getBufferEnd());
|
|
Stream.init(StreamFile);
|
|
|
|
// Sniff for the signature.
|
|
if (Stream.Read(8) != 'C' ||
|
|
Stream.Read(8) != 'P' ||
|
|
Stream.Read(8) != 'C' ||
|
|
Stream.Read(8) != 'H') {
|
|
fprintf(stderr,
|
|
"error: '%s' does not appear to be a precompiled header file\n",
|
|
PCHFileName.c_str());
|
|
return std::string();
|
|
}
|
|
|
|
RecordData Record;
|
|
while (!Stream.AtEndOfStream()) {
|
|
unsigned Code = Stream.ReadCode();
|
|
|
|
if (Code == llvm::bitc::ENTER_SUBBLOCK) {
|
|
unsigned BlockID = Stream.ReadSubBlockID();
|
|
|
|
// We only know the PCH subblock ID.
|
|
switch (BlockID) {
|
|
case pch::PCH_BLOCK_ID:
|
|
if (Stream.EnterSubBlock(pch::PCH_BLOCK_ID)) {
|
|
fprintf(stderr, "error: malformed block record in PCH file\n");
|
|
return std::string();
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (Stream.SkipBlock()) {
|
|
fprintf(stderr, "error: malformed block record in PCH file\n");
|
|
return std::string();
|
|
}
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (Code == llvm::bitc::END_BLOCK) {
|
|
if (Stream.ReadBlockEnd()) {
|
|
fprintf(stderr, "error: error at end of module block in PCH file\n");
|
|
return std::string();
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (Code == llvm::bitc::DEFINE_ABBREV) {
|
|
Stream.ReadAbbrevRecord();
|
|
continue;
|
|
}
|
|
|
|
Record.clear();
|
|
const char *BlobStart = 0;
|
|
unsigned BlobLen = 0;
|
|
if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen)
|
|
== pch::ORIGINAL_FILE_NAME)
|
|
return std::string(BlobStart, BlobLen);
|
|
}
|
|
|
|
return std::string();
|
|
}
|
|
|
|
/// \brief Parse the record that corresponds to a LangOptions data
|
|
/// structure.
|
|
///
|
|
/// This routine compares the language options used to generate the
|
|
/// PCH file against the language options set for the current
|
|
/// compilation. For each option, we classify differences between the
|
|
/// two compiler states as either "benign" or "important". Benign
|
|
/// differences don't matter, and we accept them without complaint
|
|
/// (and without modifying the language options). Differences between
|
|
/// the states for important options cause the PCH file to be
|
|
/// unusable, so we emit a warning and return true to indicate that
|
|
/// there was an error.
|
|
///
|
|
/// \returns true if the PCH file is unacceptable, false otherwise.
|
|
bool PCHReader::ParseLanguageOptions(
|
|
const llvm::SmallVectorImpl<uint64_t> &Record) {
|
|
if (Listener) {
|
|
LangOptions LangOpts;
|
|
|
|
#define PARSE_LANGOPT(Option) \
|
|
LangOpts.Option = Record[Idx]; \
|
|
++Idx
|
|
|
|
unsigned Idx = 0;
|
|
PARSE_LANGOPT(Trigraphs);
|
|
PARSE_LANGOPT(BCPLComment);
|
|
PARSE_LANGOPT(DollarIdents);
|
|
PARSE_LANGOPT(AsmPreprocessor);
|
|
PARSE_LANGOPT(GNUMode);
|
|
PARSE_LANGOPT(ImplicitInt);
|
|
PARSE_LANGOPT(Digraphs);
|
|
PARSE_LANGOPT(HexFloats);
|
|
PARSE_LANGOPT(C99);
|
|
PARSE_LANGOPT(Microsoft);
|
|
PARSE_LANGOPT(CPlusPlus);
|
|
PARSE_LANGOPT(CPlusPlus0x);
|
|
PARSE_LANGOPT(CXXOperatorNames);
|
|
PARSE_LANGOPT(ObjC1);
|
|
PARSE_LANGOPT(ObjC2);
|
|
PARSE_LANGOPT(ObjCNonFragileABI);
|
|
PARSE_LANGOPT(PascalStrings);
|
|
PARSE_LANGOPT(WritableStrings);
|
|
PARSE_LANGOPT(LaxVectorConversions);
|
|
PARSE_LANGOPT(AltiVec);
|
|
PARSE_LANGOPT(Exceptions);
|
|
PARSE_LANGOPT(NeXTRuntime);
|
|
PARSE_LANGOPT(Freestanding);
|
|
PARSE_LANGOPT(NoBuiltin);
|
|
PARSE_LANGOPT(ThreadsafeStatics);
|
|
PARSE_LANGOPT(Blocks);
|
|
PARSE_LANGOPT(EmitAllDecls);
|
|
PARSE_LANGOPT(MathErrno);
|
|
PARSE_LANGOPT(OverflowChecking);
|
|
PARSE_LANGOPT(HeinousExtensions);
|
|
PARSE_LANGOPT(Optimize);
|
|
PARSE_LANGOPT(OptimizeSize);
|
|
PARSE_LANGOPT(Static);
|
|
PARSE_LANGOPT(PICLevel);
|
|
PARSE_LANGOPT(GNUInline);
|
|
PARSE_LANGOPT(NoInline);
|
|
PARSE_LANGOPT(AccessControl);
|
|
PARSE_LANGOPT(CharIsSigned);
|
|
LangOpts.setGCMode((LangOptions::GCMode)Record[Idx]);
|
|
++Idx;
|
|
LangOpts.setVisibilityMode((LangOptions::VisibilityMode)Record[Idx]);
|
|
++Idx;
|
|
PARSE_LANGOPT(InstantiationDepth);
|
|
PARSE_LANGOPT(OpenCL);
|
|
#undef PARSE_LANGOPT
|
|
|
|
return Listener->ReadLanguageOptions(LangOpts);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void PCHReader::ReadComments(std::vector<SourceRange> &Comments) {
|
|
Comments.resize(NumComments);
|
|
std::copy(this->Comments, this->Comments + NumComments,
|
|
Comments.begin());
|
|
}
|
|
|
|
/// \brief Read and return the type at the given offset.
|
|
///
|
|
/// This routine actually reads the record corresponding to the type
|
|
/// at the given offset in the bitstream. It is a helper routine for
|
|
/// GetType, which deals with reading type IDs.
|
|
QualType PCHReader::ReadTypeRecord(uint64_t Offset) {
|
|
// Keep track of where we are in the stream, then jump back there
|
|
// after reading this type.
|
|
SavedStreamPosition SavedPosition(Stream);
|
|
|
|
// Note that we are loading a type record.
|
|
LoadingTypeOrDecl Loading(*this);
|
|
|
|
Stream.JumpToBit(Offset);
|
|
RecordData Record;
|
|
unsigned Code = Stream.ReadCode();
|
|
switch ((pch::TypeCode)Stream.ReadRecord(Code, Record)) {
|
|
case pch::TYPE_EXT_QUAL: {
|
|
assert(Record.size() == 3 &&
|
|
"Incorrect encoding of extended qualifier type");
|
|
QualType Base = GetType(Record[0]);
|
|
QualType::GCAttrTypes GCAttr = (QualType::GCAttrTypes)Record[1];
|
|
unsigned AddressSpace = Record[2];
|
|
|
|
QualType T = Base;
|
|
if (GCAttr != QualType::GCNone)
|
|
T = Context->getObjCGCQualType(T, GCAttr);
|
|
if (AddressSpace)
|
|
T = Context->getAddrSpaceQualType(T, AddressSpace);
|
|
return T;
|
|
}
|
|
|
|
case pch::TYPE_FIXED_WIDTH_INT: {
|
|
assert(Record.size() == 2 && "Incorrect encoding of fixed-width int type");
|
|
return Context->getFixedWidthIntType(Record[0], Record[1]);
|
|
}
|
|
|
|
case pch::TYPE_COMPLEX: {
|
|
assert(Record.size() == 1 && "Incorrect encoding of complex type");
|
|
QualType ElemType = GetType(Record[0]);
|
|
return Context->getComplexType(ElemType);
|
|
}
|
|
|
|
case pch::TYPE_POINTER: {
|
|
assert(Record.size() == 1 && "Incorrect encoding of pointer type");
|
|
QualType PointeeType = GetType(Record[0]);
|
|
return Context->getPointerType(PointeeType);
|
|
}
|
|
|
|
case pch::TYPE_BLOCK_POINTER: {
|
|
assert(Record.size() == 1 && "Incorrect encoding of block pointer type");
|
|
QualType PointeeType = GetType(Record[0]);
|
|
return Context->getBlockPointerType(PointeeType);
|
|
}
|
|
|
|
case pch::TYPE_LVALUE_REFERENCE: {
|
|
assert(Record.size() == 1 && "Incorrect encoding of lvalue reference type");
|
|
QualType PointeeType = GetType(Record[0]);
|
|
return Context->getLValueReferenceType(PointeeType);
|
|
}
|
|
|
|
case pch::TYPE_RVALUE_REFERENCE: {
|
|
assert(Record.size() == 1 && "Incorrect encoding of rvalue reference type");
|
|
QualType PointeeType = GetType(Record[0]);
|
|
return Context->getRValueReferenceType(PointeeType);
|
|
}
|
|
|
|
case pch::TYPE_MEMBER_POINTER: {
|
|
assert(Record.size() == 1 && "Incorrect encoding of member pointer type");
|
|
QualType PointeeType = GetType(Record[0]);
|
|
QualType ClassType = GetType(Record[1]);
|
|
return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr());
|
|
}
|
|
|
|
case pch::TYPE_CONSTANT_ARRAY: {
|
|
QualType ElementType = GetType(Record[0]);
|
|
ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
|
|
unsigned IndexTypeQuals = Record[2];
|
|
unsigned Idx = 3;
|
|
llvm::APInt Size = ReadAPInt(Record, Idx);
|
|
return Context->getConstantArrayType(ElementType, Size,
|
|
ASM, IndexTypeQuals);
|
|
}
|
|
|
|
case pch::TYPE_CONSTANT_ARRAY_WITH_EXPR: {
|
|
QualType ElementType = GetType(Record[0]);
|
|
ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
|
|
unsigned IndexTypeQuals = Record[2];
|
|
SourceLocation LBLoc = SourceLocation::getFromRawEncoding(Record[3]);
|
|
SourceLocation RBLoc = SourceLocation::getFromRawEncoding(Record[4]);
|
|
unsigned Idx = 5;
|
|
llvm::APInt Size = ReadAPInt(Record, Idx);
|
|
return Context->getConstantArrayWithExprType(ElementType,
|
|
Size, ReadTypeExpr(),
|
|
ASM, IndexTypeQuals,
|
|
SourceRange(LBLoc, RBLoc));
|
|
}
|
|
|
|
case pch::TYPE_CONSTANT_ARRAY_WITHOUT_EXPR: {
|
|
QualType ElementType = GetType(Record[0]);
|
|
ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
|
|
unsigned IndexTypeQuals = Record[2];
|
|
unsigned Idx = 3;
|
|
llvm::APInt Size = ReadAPInt(Record, Idx);
|
|
return Context->getConstantArrayWithoutExprType(ElementType, Size,
|
|
ASM, IndexTypeQuals);
|
|
}
|
|
|
|
case pch::TYPE_INCOMPLETE_ARRAY: {
|
|
QualType ElementType = GetType(Record[0]);
|
|
ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
|
|
unsigned IndexTypeQuals = Record[2];
|
|
return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
|
|
}
|
|
|
|
case pch::TYPE_VARIABLE_ARRAY: {
|
|
QualType ElementType = GetType(Record[0]);
|
|
ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
|
|
unsigned IndexTypeQuals = Record[2];
|
|
SourceLocation LBLoc = SourceLocation::getFromRawEncoding(Record[3]);
|
|
SourceLocation RBLoc = SourceLocation::getFromRawEncoding(Record[4]);
|
|
return Context->getVariableArrayType(ElementType, ReadTypeExpr(),
|
|
ASM, IndexTypeQuals,
|
|
SourceRange(LBLoc, RBLoc));
|
|
}
|
|
|
|
case pch::TYPE_VECTOR: {
|
|
if (Record.size() != 2) {
|
|
Error("incorrect encoding of vector type in PCH file");
|
|
return QualType();
|
|
}
|
|
|
|
QualType ElementType = GetType(Record[0]);
|
|
unsigned NumElements = Record[1];
|
|
return Context->getVectorType(ElementType, NumElements);
|
|
}
|
|
|
|
case pch::TYPE_EXT_VECTOR: {
|
|
if (Record.size() != 2) {
|
|
Error("incorrect encoding of extended vector type in PCH file");
|
|
return QualType();
|
|
}
|
|
|
|
QualType ElementType = GetType(Record[0]);
|
|
unsigned NumElements = Record[1];
|
|
return Context->getExtVectorType(ElementType, NumElements);
|
|
}
|
|
|
|
case pch::TYPE_FUNCTION_NO_PROTO: {
|
|
if (Record.size() != 1) {
|
|
Error("incorrect encoding of no-proto function type");
|
|
return QualType();
|
|
}
|
|
QualType ResultType = GetType(Record[0]);
|
|
return Context->getFunctionNoProtoType(ResultType);
|
|
}
|
|
|
|
case pch::TYPE_FUNCTION_PROTO: {
|
|
QualType ResultType = GetType(Record[0]);
|
|
unsigned Idx = 1;
|
|
unsigned NumParams = Record[Idx++];
|
|
llvm::SmallVector<QualType, 16> ParamTypes;
|
|
for (unsigned I = 0; I != NumParams; ++I)
|
|
ParamTypes.push_back(GetType(Record[Idx++]));
|
|
bool isVariadic = Record[Idx++];
|
|
unsigned Quals = Record[Idx++];
|
|
bool hasExceptionSpec = Record[Idx++];
|
|
bool hasAnyExceptionSpec = Record[Idx++];
|
|
unsigned NumExceptions = Record[Idx++];
|
|
llvm::SmallVector<QualType, 2> Exceptions;
|
|
for (unsigned I = 0; I != NumExceptions; ++I)
|
|
Exceptions.push_back(GetType(Record[Idx++]));
|
|
return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams,
|
|
isVariadic, Quals, hasExceptionSpec,
|
|
hasAnyExceptionSpec, NumExceptions,
|
|
Exceptions.data());
|
|
}
|
|
|
|
case pch::TYPE_TYPEDEF:
|
|
assert(Record.size() == 1 && "incorrect encoding of typedef type");
|
|
return Context->getTypeDeclType(cast<TypedefDecl>(GetDecl(Record[0])));
|
|
|
|
case pch::TYPE_TYPEOF_EXPR:
|
|
return Context->getTypeOfExprType(ReadTypeExpr());
|
|
|
|
case pch::TYPE_TYPEOF: {
|
|
if (Record.size() != 1) {
|
|
Error("incorrect encoding of typeof(type) in PCH file");
|
|
return QualType();
|
|
}
|
|
QualType UnderlyingType = GetType(Record[0]);
|
|
return Context->getTypeOfType(UnderlyingType);
|
|
}
|
|
|
|
case pch::TYPE_DECLTYPE:
|
|
return Context->getDecltypeType(ReadTypeExpr());
|
|
|
|
case pch::TYPE_RECORD:
|
|
assert(Record.size() == 1 && "incorrect encoding of record type");
|
|
return Context->getTypeDeclType(cast<RecordDecl>(GetDecl(Record[0])));
|
|
|
|
case pch::TYPE_ENUM:
|
|
assert(Record.size() == 1 && "incorrect encoding of enum type");
|
|
return Context->getTypeDeclType(cast<EnumDecl>(GetDecl(Record[0])));
|
|
|
|
case pch::TYPE_OBJC_INTERFACE: {
|
|
unsigned Idx = 0;
|
|
ObjCInterfaceDecl *ItfD = cast<ObjCInterfaceDecl>(GetDecl(Record[Idx++]));
|
|
unsigned NumProtos = Record[Idx++];
|
|
llvm::SmallVector<ObjCProtocolDecl*, 4> Protos;
|
|
for (unsigned I = 0; I != NumProtos; ++I)
|
|
Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++])));
|
|
return Context->getObjCInterfaceType(ItfD, Protos.data(), NumProtos);
|
|
}
|
|
|
|
case pch::TYPE_OBJC_OBJECT_POINTER: {
|
|
unsigned Idx = 0;
|
|
QualType OIT = GetType(Record[Idx++]);
|
|
unsigned NumProtos = Record[Idx++];
|
|
llvm::SmallVector<ObjCProtocolDecl*, 4> Protos;
|
|
for (unsigned I = 0; I != NumProtos; ++I)
|
|
Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++])));
|
|
return Context->getObjCObjectPointerType(OIT, Protos.data(), NumProtos);
|
|
}
|
|
}
|
|
// Suppress a GCC warning
|
|
return QualType();
|
|
}
|
|
|
|
|
|
QualType PCHReader::GetType(pch::TypeID ID) {
|
|
unsigned Quals = ID & 0x07;
|
|
unsigned Index = ID >> 3;
|
|
|
|
if (Index < pch::NUM_PREDEF_TYPE_IDS) {
|
|
QualType T;
|
|
switch ((pch::PredefinedTypeIDs)Index) {
|
|
case pch::PREDEF_TYPE_NULL_ID: return QualType();
|
|
case pch::PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break;
|
|
case pch::PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break;
|
|
|
|
case pch::PREDEF_TYPE_CHAR_U_ID:
|
|
case pch::PREDEF_TYPE_CHAR_S_ID:
|
|
// FIXME: Check that the signedness of CharTy is correct!
|
|
T = Context->CharTy;
|
|
break;
|
|
|
|
case pch::PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break;
|
|
case pch::PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break;
|
|
case pch::PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break;
|
|
case pch::PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break;
|
|
case pch::PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break;
|
|
case pch::PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break;
|
|
case pch::PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break;
|
|
case pch::PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break;
|
|
case pch::PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break;
|
|
case pch::PREDEF_TYPE_INT_ID: T = Context->IntTy; break;
|
|
case pch::PREDEF_TYPE_LONG_ID: T = Context->LongTy; break;
|
|
case pch::PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break;
|
|
case pch::PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break;
|
|
case pch::PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break;
|
|
case pch::PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break;
|
|
case pch::PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break;
|
|
case pch::PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break;
|
|
case pch::PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break;
|
|
case pch::PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break;
|
|
case pch::PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break;
|
|
case pch::PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break;
|
|
case pch::PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break;
|
|
case pch::PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break;
|
|
}
|
|
|
|
assert(!T.isNull() && "Unknown predefined type");
|
|
return T.getQualifiedType(Quals);
|
|
}
|
|
|
|
Index -= pch::NUM_PREDEF_TYPE_IDS;
|
|
//assert(Index < TypesLoaded.size() && "Type index out-of-range");
|
|
if (!TypesLoaded[Index])
|
|
TypesLoaded[Index] = ReadTypeRecord(TypeOffsets[Index]).getTypePtr();
|
|
|
|
return QualType(TypesLoaded[Index], Quals);
|
|
}
|
|
|
|
Decl *PCHReader::GetDecl(pch::DeclID ID) {
|
|
if (ID == 0)
|
|
return 0;
|
|
|
|
if (ID > DeclsLoaded.size()) {
|
|
Error("declaration ID out-of-range for PCH file");
|
|
return 0;
|
|
}
|
|
|
|
unsigned Index = ID - 1;
|
|
if (!DeclsLoaded[Index])
|
|
ReadDeclRecord(DeclOffsets[Index], Index);
|
|
|
|
return DeclsLoaded[Index];
|
|
}
|
|
|
|
/// \brief Resolve the offset of a statement into a statement.
|
|
///
|
|
/// This operation will read a new statement from the external
|
|
/// source each time it is called, and is meant to be used via a
|
|
/// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
|
|
Stmt *PCHReader::GetDeclStmt(uint64_t Offset) {
|
|
// Since we know tha this statement is part of a decl, make sure to use the
|
|
// decl cursor to read it.
|
|
DeclsCursor.JumpToBit(Offset);
|
|
return ReadStmt(DeclsCursor);
|
|
}
|
|
|
|
bool PCHReader::ReadDeclsLexicallyInContext(DeclContext *DC,
|
|
llvm::SmallVectorImpl<pch::DeclID> &Decls) {
|
|
assert(DC->hasExternalLexicalStorage() &&
|
|
"DeclContext has no lexical decls in storage");
|
|
uint64_t Offset = DeclContextOffsets[DC].first;
|
|
assert(Offset && "DeclContext has no lexical decls in storage");
|
|
|
|
// Keep track of where we are in the stream, then jump back there
|
|
// after reading this context.
|
|
SavedStreamPosition SavedPosition(DeclsCursor);
|
|
|
|
// Load the record containing all of the declarations lexically in
|
|
// this context.
|
|
DeclsCursor.JumpToBit(Offset);
|
|
RecordData Record;
|
|
unsigned Code = DeclsCursor.ReadCode();
|
|
unsigned RecCode = DeclsCursor.ReadRecord(Code, Record);
|
|
(void)RecCode;
|
|
assert(RecCode == pch::DECL_CONTEXT_LEXICAL && "Expected lexical block");
|
|
|
|
// Load all of the declaration IDs
|
|
Decls.clear();
|
|
Decls.insert(Decls.end(), Record.begin(), Record.end());
|
|
++NumLexicalDeclContextsRead;
|
|
return false;
|
|
}
|
|
|
|
bool PCHReader::ReadDeclsVisibleInContext(DeclContext *DC,
|
|
llvm::SmallVectorImpl<VisibleDeclaration> &Decls) {
|
|
assert(DC->hasExternalVisibleStorage() &&
|
|
"DeclContext has no visible decls in storage");
|
|
uint64_t Offset = DeclContextOffsets[DC].second;
|
|
assert(Offset && "DeclContext has no visible decls in storage");
|
|
|
|
// Keep track of where we are in the stream, then jump back there
|
|
// after reading this context.
|
|
SavedStreamPosition SavedPosition(DeclsCursor);
|
|
|
|
// Load the record containing all of the declarations visible in
|
|
// this context.
|
|
DeclsCursor.JumpToBit(Offset);
|
|
RecordData Record;
|
|
unsigned Code = DeclsCursor.ReadCode();
|
|
unsigned RecCode = DeclsCursor.ReadRecord(Code, Record);
|
|
(void)RecCode;
|
|
assert(RecCode == pch::DECL_CONTEXT_VISIBLE && "Expected visible block");
|
|
if (Record.size() == 0)
|
|
return false;
|
|
|
|
Decls.clear();
|
|
|
|
unsigned Idx = 0;
|
|
while (Idx < Record.size()) {
|
|
Decls.push_back(VisibleDeclaration());
|
|
Decls.back().Name = ReadDeclarationName(Record, Idx);
|
|
|
|
unsigned Size = Record[Idx++];
|
|
llvm::SmallVector<unsigned, 4> &LoadedDecls = Decls.back().Declarations;
|
|
LoadedDecls.reserve(Size);
|
|
for (unsigned I = 0; I < Size; ++I)
|
|
LoadedDecls.push_back(Record[Idx++]);
|
|
}
|
|
|
|
++NumVisibleDeclContextsRead;
|
|
return false;
|
|
}
|
|
|
|
void PCHReader::StartTranslationUnit(ASTConsumer *Consumer) {
|
|
this->Consumer = Consumer;
|
|
|
|
if (!Consumer)
|
|
return;
|
|
|
|
for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) {
|
|
Decl *D = GetDecl(ExternalDefinitions[I]);
|
|
DeclGroupRef DG(D);
|
|
Consumer->HandleTopLevelDecl(DG);
|
|
}
|
|
|
|
for (unsigned I = 0, N = InterestingDecls.size(); I != N; ++I) {
|
|
DeclGroupRef DG(InterestingDecls[I]);
|
|
Consumer->HandleTopLevelDecl(DG);
|
|
}
|
|
}
|
|
|
|
void PCHReader::PrintStats() {
|
|
std::fprintf(stderr, "*** PCH Statistics:\n");
|
|
|
|
unsigned NumTypesLoaded
|
|
= TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(),
|
|
(Type *)0);
|
|
unsigned NumDeclsLoaded
|
|
= DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(),
|
|
(Decl *)0);
|
|
unsigned NumIdentifiersLoaded
|
|
= IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(),
|
|
IdentifiersLoaded.end(),
|
|
(IdentifierInfo *)0);
|
|
unsigned NumSelectorsLoaded
|
|
= SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(),
|
|
SelectorsLoaded.end(),
|
|
Selector());
|
|
|
|
std::fprintf(stderr, " %u stat cache hits\n", NumStatHits);
|
|
std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses);
|
|
if (TotalNumSLocEntries)
|
|
std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n",
|
|
NumSLocEntriesRead, TotalNumSLocEntries,
|
|
((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
|
|
if (!TypesLoaded.empty())
|
|
std::fprintf(stderr, " %u/%u types read (%f%%)\n",
|
|
NumTypesLoaded, (unsigned)TypesLoaded.size(),
|
|
((float)NumTypesLoaded/TypesLoaded.size() * 100));
|
|
if (!DeclsLoaded.empty())
|
|
std::fprintf(stderr, " %u/%u declarations read (%f%%)\n",
|
|
NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
|
|
((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
|
|
if (!IdentifiersLoaded.empty())
|
|
std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n",
|
|
NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
|
|
((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
|
|
if (TotalNumSelectors)
|
|
std::fprintf(stderr, " %u/%u selectors read (%f%%)\n",
|
|
NumSelectorsLoaded, TotalNumSelectors,
|
|
((float)NumSelectorsLoaded/TotalNumSelectors * 100));
|
|
if (TotalNumStatements)
|
|
std::fprintf(stderr, " %u/%u statements read (%f%%)\n",
|
|
NumStatementsRead, TotalNumStatements,
|
|
((float)NumStatementsRead/TotalNumStatements * 100));
|
|
if (TotalNumMacros)
|
|
std::fprintf(stderr, " %u/%u macros read (%f%%)\n",
|
|
NumMacrosRead, TotalNumMacros,
|
|
((float)NumMacrosRead/TotalNumMacros * 100));
|
|
if (TotalLexicalDeclContexts)
|
|
std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n",
|
|
NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
|
|
((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
|
|
* 100));
|
|
if (TotalVisibleDeclContexts)
|
|
std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n",
|
|
NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
|
|
((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
|
|
* 100));
|
|
if (TotalSelectorsInMethodPool) {
|
|
std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n",
|
|
NumMethodPoolSelectorsRead, TotalSelectorsInMethodPool,
|
|
((float)NumMethodPoolSelectorsRead/TotalSelectorsInMethodPool
|
|
* 100));
|
|
std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses);
|
|
}
|
|
std::fprintf(stderr, "\n");
|
|
}
|
|
|
|
void PCHReader::InitializeSema(Sema &S) {
|
|
SemaObj = &S;
|
|
S.ExternalSource = this;
|
|
|
|
// Makes sure any declarations that were deserialized "too early"
|
|
// still get added to the identifier's declaration chains.
|
|
for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) {
|
|
SemaObj->TUScope->AddDecl(Action::DeclPtrTy::make(PreloadedDecls[I]));
|
|
SemaObj->IdResolver.AddDecl(PreloadedDecls[I]);
|
|
}
|
|
PreloadedDecls.clear();
|
|
|
|
// If there were any tentative definitions, deserialize them and add
|
|
// them to Sema's table of tentative definitions.
|
|
for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
|
|
VarDecl *Var = cast<VarDecl>(GetDecl(TentativeDefinitions[I]));
|
|
SemaObj->TentativeDefinitions[Var->getDeclName()] = Var;
|
|
}
|
|
|
|
// If there were any locally-scoped external declarations,
|
|
// deserialize them and add them to Sema's table of locally-scoped
|
|
// external declarations.
|
|
for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) {
|
|
NamedDecl *D = cast<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I]));
|
|
SemaObj->LocallyScopedExternalDecls[D->getDeclName()] = D;
|
|
}
|
|
|
|
// If there were any ext_vector type declarations, deserialize them
|
|
// and add them to Sema's vector of such declarations.
|
|
for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I)
|
|
SemaObj->ExtVectorDecls.push_back(
|
|
cast<TypedefDecl>(GetDecl(ExtVectorDecls[I])));
|
|
|
|
// If there were any Objective-C category implementations,
|
|
// deserialize them and add them to Sema's vector of such
|
|
// definitions.
|
|
for (unsigned I = 0, N = ObjCCategoryImpls.size(); I != N; ++I)
|
|
SemaObj->ObjCCategoryImpls.push_back(
|
|
cast<ObjCCategoryImplDecl>(GetDecl(ObjCCategoryImpls[I])));
|
|
}
|
|
|
|
IdentifierInfo* PCHReader::get(const char *NameStart, const char *NameEnd) {
|
|
// Try to find this name within our on-disk hash table
|
|
PCHIdentifierLookupTable *IdTable
|
|
= (PCHIdentifierLookupTable *)IdentifierLookupTable;
|
|
std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart);
|
|
PCHIdentifierLookupTable::iterator Pos = IdTable->find(Key);
|
|
if (Pos == IdTable->end())
|
|
return 0;
|
|
|
|
// Dereferencing the iterator has the effect of building the
|
|
// IdentifierInfo node and populating it with the various
|
|
// declarations it needs.
|
|
return *Pos;
|
|
}
|
|
|
|
std::pair<ObjCMethodList, ObjCMethodList>
|
|
PCHReader::ReadMethodPool(Selector Sel) {
|
|
if (!MethodPoolLookupTable)
|
|
return std::pair<ObjCMethodList, ObjCMethodList>();
|
|
|
|
// Try to find this selector within our on-disk hash table.
|
|
PCHMethodPoolLookupTable *PoolTable
|
|
= (PCHMethodPoolLookupTable*)MethodPoolLookupTable;
|
|
PCHMethodPoolLookupTable::iterator Pos = PoolTable->find(Sel);
|
|
if (Pos == PoolTable->end()) {
|
|
++NumMethodPoolMisses;
|
|
return std::pair<ObjCMethodList, ObjCMethodList>();;
|
|
}
|
|
|
|
++NumMethodPoolSelectorsRead;
|
|
return *Pos;
|
|
}
|
|
|
|
void PCHReader::SetIdentifierInfo(unsigned ID, IdentifierInfo *II) {
|
|
assert(ID && "Non-zero identifier ID required");
|
|
assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range");
|
|
IdentifiersLoaded[ID - 1] = II;
|
|
}
|
|
|
|
/// \brief Set the globally-visible declarations associated with the given
|
|
/// identifier.
|
|
///
|
|
/// If the PCH reader is currently in a state where the given declaration IDs
|
|
/// cannot safely be resolved, they are queued until it is safe to resolve
|
|
/// them.
|
|
///
|
|
/// \param II an IdentifierInfo that refers to one or more globally-visible
|
|
/// declarations.
|
|
///
|
|
/// \param DeclIDs the set of declaration IDs with the name @p II that are
|
|
/// visible at global scope.
|
|
///
|
|
/// \param Nonrecursive should be true to indicate that the caller knows that
|
|
/// this call is non-recursive, and therefore the globally-visible declarations
|
|
/// will not be placed onto the pending queue.
|
|
void
|
|
PCHReader::SetGloballyVisibleDecls(IdentifierInfo *II,
|
|
const llvm::SmallVectorImpl<uint32_t> &DeclIDs,
|
|
bool Nonrecursive) {
|
|
if (CurrentlyLoadingTypeOrDecl && !Nonrecursive) {
|
|
PendingIdentifierInfos.push_back(PendingIdentifierInfo());
|
|
PendingIdentifierInfo &PII = PendingIdentifierInfos.back();
|
|
PII.II = II;
|
|
for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I)
|
|
PII.DeclIDs.push_back(DeclIDs[I]);
|
|
return;
|
|
}
|
|
|
|
for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
|
|
NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I]));
|
|
if (SemaObj) {
|
|
// Introduce this declaration into the translation-unit scope
|
|
// and add it to the declaration chain for this identifier, so
|
|
// that (unqualified) name lookup will find it.
|
|
SemaObj->TUScope->AddDecl(Action::DeclPtrTy::make(D));
|
|
SemaObj->IdResolver.AddDeclToIdentifierChain(II, D);
|
|
} else {
|
|
// Queue this declaration so that it will be added to the
|
|
// translation unit scope and identifier's declaration chain
|
|
// once a Sema object is known.
|
|
PreloadedDecls.push_back(D);
|
|
}
|
|
}
|
|
}
|
|
|
|
IdentifierInfo *PCHReader::DecodeIdentifierInfo(unsigned ID) {
|
|
if (ID == 0)
|
|
return 0;
|
|
|
|
if (!IdentifierTableData || IdentifiersLoaded.empty()) {
|
|
Error("no identifier table in PCH file");
|
|
return 0;
|
|
}
|
|
|
|
assert(PP && "Forgot to set Preprocessor ?");
|
|
if (!IdentifiersLoaded[ID - 1]) {
|
|
uint32_t Offset = IdentifierOffsets[ID - 1];
|
|
const char *Str = IdentifierTableData + Offset;
|
|
|
|
// All of the strings in the PCH file are preceded by a 16-bit
|
|
// length. Extract that 16-bit length to avoid having to execute
|
|
// strlen().
|
|
const char *StrLenPtr = Str - 2;
|
|
unsigned StrLen = (((unsigned) StrLenPtr[0])
|
|
| (((unsigned) StrLenPtr[1]) << 8)) - 1;
|
|
IdentifiersLoaded[ID - 1]
|
|
= &PP->getIdentifierTable().get(Str, Str + StrLen);
|
|
}
|
|
|
|
return IdentifiersLoaded[ID - 1];
|
|
}
|
|
|
|
void PCHReader::ReadSLocEntry(unsigned ID) {
|
|
ReadSLocEntryRecord(ID);
|
|
}
|
|
|
|
Selector PCHReader::DecodeSelector(unsigned ID) {
|
|
if (ID == 0)
|
|
return Selector();
|
|
|
|
if (!MethodPoolLookupTableData)
|
|
return Selector();
|
|
|
|
if (ID > TotalNumSelectors) {
|
|
Error("selector ID out of range in PCH file");
|
|
return Selector();
|
|
}
|
|
|
|
unsigned Index = ID - 1;
|
|
if (SelectorsLoaded[Index].getAsOpaquePtr() == 0) {
|
|
// Load this selector from the selector table.
|
|
// FIXME: endianness portability issues with SelectorOffsets table
|
|
PCHMethodPoolLookupTrait Trait(*this);
|
|
SelectorsLoaded[Index]
|
|
= Trait.ReadKey(MethodPoolLookupTableData + SelectorOffsets[Index], 0);
|
|
}
|
|
|
|
return SelectorsLoaded[Index];
|
|
}
|
|
|
|
DeclarationName
|
|
PCHReader::ReadDeclarationName(const RecordData &Record, unsigned &Idx) {
|
|
DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++];
|
|
switch (Kind) {
|
|
case DeclarationName::Identifier:
|
|
return DeclarationName(GetIdentifierInfo(Record, Idx));
|
|
|
|
case DeclarationName::ObjCZeroArgSelector:
|
|
case DeclarationName::ObjCOneArgSelector:
|
|
case DeclarationName::ObjCMultiArgSelector:
|
|
return DeclarationName(GetSelector(Record, Idx));
|
|
|
|
case DeclarationName::CXXConstructorName:
|
|
return Context->DeclarationNames.getCXXConstructorName(
|
|
GetType(Record[Idx++]));
|
|
|
|
case DeclarationName::CXXDestructorName:
|
|
return Context->DeclarationNames.getCXXDestructorName(
|
|
GetType(Record[Idx++]));
|
|
|
|
case DeclarationName::CXXConversionFunctionName:
|
|
return Context->DeclarationNames.getCXXConversionFunctionName(
|
|
GetType(Record[Idx++]));
|
|
|
|
case DeclarationName::CXXOperatorName:
|
|
return Context->DeclarationNames.getCXXOperatorName(
|
|
(OverloadedOperatorKind)Record[Idx++]);
|
|
|
|
case DeclarationName::CXXUsingDirective:
|
|
return DeclarationName::getUsingDirectiveName();
|
|
}
|
|
|
|
// Required to silence GCC warning
|
|
return DeclarationName();
|
|
}
|
|
|
|
/// \brief Read an integral value
|
|
llvm::APInt PCHReader::ReadAPInt(const RecordData &Record, unsigned &Idx) {
|
|
unsigned BitWidth = Record[Idx++];
|
|
unsigned NumWords = llvm::APInt::getNumWords(BitWidth);
|
|
llvm::APInt Result(BitWidth, NumWords, &Record[Idx]);
|
|
Idx += NumWords;
|
|
return Result;
|
|
}
|
|
|
|
/// \brief Read a signed integral value
|
|
llvm::APSInt PCHReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) {
|
|
bool isUnsigned = Record[Idx++];
|
|
return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned);
|
|
}
|
|
|
|
/// \brief Read a floating-point value
|
|
llvm::APFloat PCHReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) {
|
|
return llvm::APFloat(ReadAPInt(Record, Idx));
|
|
}
|
|
|
|
// \brief Read a string
|
|
std::string PCHReader::ReadString(const RecordData &Record, unsigned &Idx) {
|
|
unsigned Len = Record[Idx++];
|
|
std::string Result(Record.data() + Idx, Record.data() + Idx + Len);
|
|
Idx += Len;
|
|
return Result;
|
|
}
|
|
|
|
DiagnosticBuilder PCHReader::Diag(unsigned DiagID) {
|
|
return Diag(SourceLocation(), DiagID);
|
|
}
|
|
|
|
DiagnosticBuilder PCHReader::Diag(SourceLocation Loc, unsigned DiagID) {
|
|
return Diags.Report(FullSourceLoc(Loc, SourceMgr), DiagID);
|
|
}
|
|
|
|
/// \brief Retrieve the identifier table associated with the
|
|
/// preprocessor.
|
|
IdentifierTable &PCHReader::getIdentifierTable() {
|
|
assert(PP && "Forgot to set Preprocessor ?");
|
|
return PP->getIdentifierTable();
|
|
}
|
|
|
|
/// \brief Record that the given ID maps to the given switch-case
|
|
/// statement.
|
|
void PCHReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) {
|
|
assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID");
|
|
SwitchCaseStmts[ID] = SC;
|
|
}
|
|
|
|
/// \brief Retrieve the switch-case statement with the given ID.
|
|
SwitchCase *PCHReader::getSwitchCaseWithID(unsigned ID) {
|
|
assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID");
|
|
return SwitchCaseStmts[ID];
|
|
}
|
|
|
|
/// \brief Record that the given label statement has been
|
|
/// deserialized and has the given ID.
|
|
void PCHReader::RecordLabelStmt(LabelStmt *S, unsigned ID) {
|
|
assert(LabelStmts.find(ID) == LabelStmts.end() &&
|
|
"Deserialized label twice");
|
|
LabelStmts[ID] = S;
|
|
|
|
// If we've already seen any goto statements that point to this
|
|
// label, resolve them now.
|
|
typedef std::multimap<unsigned, GotoStmt *>::iterator GotoIter;
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|
std::pair<GotoIter, GotoIter> Gotos = UnresolvedGotoStmts.equal_range(ID);
|
|
for (GotoIter Goto = Gotos.first; Goto != Gotos.second; ++Goto)
|
|
Goto->second->setLabel(S);
|
|
UnresolvedGotoStmts.erase(Gotos.first, Gotos.second);
|
|
|
|
// If we've already seen any address-label statements that point to
|
|
// this label, resolve them now.
|
|
typedef std::multimap<unsigned, AddrLabelExpr *>::iterator AddrLabelIter;
|
|
std::pair<AddrLabelIter, AddrLabelIter> AddrLabels
|
|
= UnresolvedAddrLabelExprs.equal_range(ID);
|
|
for (AddrLabelIter AddrLabel = AddrLabels.first;
|
|
AddrLabel != AddrLabels.second; ++AddrLabel)
|
|
AddrLabel->second->setLabel(S);
|
|
UnresolvedAddrLabelExprs.erase(AddrLabels.first, AddrLabels.second);
|
|
}
|
|
|
|
/// \brief Set the label of the given statement to the label
|
|
/// identified by ID.
|
|
///
|
|
/// Depending on the order in which the label and other statements
|
|
/// referencing that label occur, this operation may complete
|
|
/// immediately (updating the statement) or it may queue the
|
|
/// statement to be back-patched later.
|
|
void PCHReader::SetLabelOf(GotoStmt *S, unsigned ID) {
|
|
std::map<unsigned, LabelStmt *>::iterator Label = LabelStmts.find(ID);
|
|
if (Label != LabelStmts.end()) {
|
|
// We've already seen this label, so set the label of the goto and
|
|
// we're done.
|
|
S->setLabel(Label->second);
|
|
} else {
|
|
// We haven't seen this label yet, so add this goto to the set of
|
|
// unresolved goto statements.
|
|
UnresolvedGotoStmts.insert(std::make_pair(ID, S));
|
|
}
|
|
}
|
|
|
|
/// \brief Set the label of the given expression to the label
|
|
/// identified by ID.
|
|
///
|
|
/// Depending on the order in which the label and other statements
|
|
/// referencing that label occur, this operation may complete
|
|
/// immediately (updating the statement) or it may queue the
|
|
/// statement to be back-patched later.
|
|
void PCHReader::SetLabelOf(AddrLabelExpr *S, unsigned ID) {
|
|
std::map<unsigned, LabelStmt *>::iterator Label = LabelStmts.find(ID);
|
|
if (Label != LabelStmts.end()) {
|
|
// We've already seen this label, so set the label of the
|
|
// label-address expression and we're done.
|
|
S->setLabel(Label->second);
|
|
} else {
|
|
// We haven't seen this label yet, so add this label-address
|
|
// expression to the set of unresolved label-address expressions.
|
|
UnresolvedAddrLabelExprs.insert(std::make_pair(ID, S));
|
|
}
|
|
}
|
|
|
|
|
|
PCHReader::LoadingTypeOrDecl::LoadingTypeOrDecl(PCHReader &Reader)
|
|
: Reader(Reader), Parent(Reader.CurrentlyLoadingTypeOrDecl) {
|
|
Reader.CurrentlyLoadingTypeOrDecl = this;
|
|
}
|
|
|
|
PCHReader::LoadingTypeOrDecl::~LoadingTypeOrDecl() {
|
|
if (!Parent) {
|
|
// If any identifiers with corresponding top-level declarations have
|
|
// been loaded, load those declarations now.
|
|
while (!Reader.PendingIdentifierInfos.empty()) {
|
|
Reader.SetGloballyVisibleDecls(Reader.PendingIdentifierInfos.front().II,
|
|
Reader.PendingIdentifierInfos.front().DeclIDs,
|
|
true);
|
|
Reader.PendingIdentifierInfos.pop_front();
|
|
}
|
|
}
|
|
|
|
Reader.CurrentlyLoadingTypeOrDecl = Parent;
|
|
}
|