53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
//===--Passes/RoundTripNativePass.cpp - Write Native file/Read it back-----===//
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//
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// The LLVM Linker
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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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#define DEBUG_TYPE "RoundTripNativePass"
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#include "lld/Core/Instrumentation.h"
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#include "lld/Passes/RoundTripNativePass.h"
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#include "lld/ReaderWriter/Simple.h"
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#include "lld/ReaderWriter/Writer.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Path.h"
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using namespace lld;
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/// Perform the actual pass
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void RoundTripNativePass::perform(std::unique_ptr<MutableFile> &mergedFile) {
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ScopedTask task(getDefaultDomain(), "RoundTripNativePass");
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std::unique_ptr<Writer> nativeWriter = createWriterNative(_context);
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SmallString<128> tmpNativeFile;
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// Separate the directory from the filename
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StringRef outFile = llvm::sys::path::filename(_context.outputPath());
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if (llvm::sys::fs::createTemporaryFile(outFile, "native", tmpNativeFile))
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return;
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DEBUG_WITH_TYPE("RoundTripNativePass", {
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llvm::dbgs() << "RoundTripNativePass: " << tmpNativeFile << "\n";
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});
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// The file that is written would be kept around if there is a problem
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// writing to the file or when reading atoms back from the file.
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nativeWriter->writeFile(*mergedFile, tmpNativeFile.str());
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OwningPtr<MemoryBuffer> buff;
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if (MemoryBuffer::getFile(tmpNativeFile.str(), buff))
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return;
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std::unique_ptr<MemoryBuffer> mb(buff.take());
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error_code ec = _context.registry().parseFile(mb, _nativeFile);
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if (ec) {
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// Note: we need a way for Passes to report errors.
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llvm_unreachable("native reader not registered or read error");
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}
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File *objFile = _nativeFile[0].get();
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mergedFile.reset(new FileToMutable(_context, *objFile));
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llvm::sys::fs::remove(tmpNativeFile.str());
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}
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