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//===--- ObjectFilePCHContainerReader.cpp ---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Serialization/ObjectFilePCHContainerReader.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/ObjectFile.h"
using namespace clang;
ArrayRef<StringRef> ObjectFilePCHContainerReader::getFormats() const {
static StringRef Formats[] = {"obj", "raw"};
return Formats;
}
StringRef
ObjectFilePCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {
StringRef PCH;
auto OFOrErr = llvm::object::ObjectFile::createObjectFile(Buffer);
if (OFOrErr) {
auto &OF = OFOrErr.get();
bool IsCOFF = isa<llvm::object::COFFObjectFile>(*OF);
// Find the clang AST section in the container.
for (auto &Section : OF->sections()) {
StringRef Name;
if (Expected<StringRef> NameOrErr = Section.getName())
Name = *NameOrErr;
else
consumeError(NameOrErr.takeError());
if ((!IsCOFF && Name == "__clangast") || (IsCOFF && Name == "clangast")) {
if (Expected<StringRef> E = Section.getContents())
return *E;
else {
handleAllErrors(E.takeError(), [&](const llvm::ErrorInfoBase &EIB) {
EIB.log(llvm::errs());
});
return "";
}
}
}
}
handleAllErrors(OFOrErr.takeError(), [&](const llvm::ErrorInfoBase &EIB) {
if (EIB.convertToErrorCode() ==
llvm::object::object_error::invalid_file_type)
// As a fallback, treat the buffer as a raw AST.
PCH = Buffer.getBuffer();
else
EIB.log(llvm::errs());
});
return PCH;
}
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