forked from OSchip/llvm-project
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
//===--- GeneratePCH.cpp - AST Consumer for PCH Generation ------*- 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 CreatePCHGenerate function, which creates an
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// ASTConsumer that generates a PCH file.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/ASTConsumers.h"
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#include "clang/Serialization/ASTWriter.h"
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#include "clang/Sema/SemaConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/FileSystemStatCache.h"
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#include "llvm/Bitcode/BitstreamWriter.h"
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#include "llvm/Support/raw_ostream.h"
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#include <string>
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using namespace clang;
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PCHGenerator::PCHGenerator(const Preprocessor &PP,
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StringRef OutputFile,
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StringRef isysroot,
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raw_ostream *OS)
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: PP(PP), OutputFile(OutputFile), isysroot(isysroot.str()), Out(OS),
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SemaPtr(0), StatCalls(0), Stream(Buffer), Writer(Stream) {
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// Install a stat() listener to keep track of all of the stat()
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// calls.
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StatCalls = new MemorizeStatCalls();
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PP.getFileManager().addStatCache(StatCalls, /*AtBeginning=*/false);
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}
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PCHGenerator::~PCHGenerator() {
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}
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void PCHGenerator::HandleTranslationUnit(ASTContext &Ctx) {
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if (PP.getDiagnostics().hasErrorOccurred())
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return;
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// Set up the serialization listener.
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Writer.SetSerializationListener(GetASTSerializationListener());
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// Emit the PCH file
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assert(SemaPtr && "No Sema?");
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Writer.WriteAST(*SemaPtr, StatCalls, OutputFile, isysroot);
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// Write the generated bitstream to "Out".
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Out->write((char *)&Buffer.front(), Buffer.size());
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// Make sure it hits disk now.
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Out->flush();
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// Free up some memory, in case the process is kept alive.
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Buffer.clear();
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}
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ASTMutationListener *PCHGenerator::GetASTMutationListener() {
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return &Writer;
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}
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ASTSerializationListener *PCHGenerator::GetASTSerializationListener() {
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return 0;
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}
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ASTDeserializationListener *PCHGenerator::GetASTDeserializationListener() {
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return &Writer;
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}
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