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//===- TestingSupport.cpp - Convert objects files into test files --------===//
//
// 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 "llvm/Object/COFF.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
#include "llvm/ProfileData/InstrProf.h"
#include "llvm/Support/Alignment.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <functional>
#include <system_error>
using namespace llvm;
using namespace object;
int convertForTestingMain(int argc, const char *argv[]) {
cl::opt<std::string> InputSourceFile(cl::Positional, cl::Required,
cl::desc("<Source file>"));
cl::opt<std::string> OutputFilename(
"o", cl::Required,
cl::desc(
"File with the profile data obtained after an instrumented run"));
cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
auto ObjErr = llvm::object::ObjectFile::createObjectFile(InputSourceFile);
if (!ObjErr) {
std::string Buf;
raw_string_ostream OS(Buf);
logAllUnhandledErrors(ObjErr.takeError(), OS);
OS.flush();
errs() << "error: " << Buf;
return 1;
}
ObjectFile *OF = ObjErr.get().getBinary();
auto BytesInAddress = OF->getBytesInAddress();
if (BytesInAddress != 8) {
errs() << "error: 64 bit binary expected\n";
return 1;
}
// Look for the sections that we are interested in.
int FoundSectionCount = 0;
SectionRef ProfileNames, CoverageMapping, CoverageRecords;
auto ObjFormat = OF->getTripleObjectFormat();
auto ProfileNamesSection = getInstrProfSectionName(IPSK_name, ObjFormat,
/*AddSegmentInfo=*/false);
auto CoverageMappingSection =
getInstrProfSectionName(IPSK_covmap, ObjFormat, /*AddSegmentInfo=*/false);
auto CoverageRecordsSection =
getInstrProfSectionName(IPSK_covfun, ObjFormat, /*AddSegmentInfo=*/false);
if (isa<object::COFFObjectFile>(OF)) {
// On COFF, the object file section name may end in "$M". This tells the
// linker to sort these sections between "$A" and "$Z". The linker removes
// the dollar and everything after it in the final binary. Do the same to
// match.
auto Strip = [](std::string &Str) {
auto Pos = Str.find('$');
if (Pos != std::string::npos)
Str.resize(Pos);
};
Strip(ProfileNamesSection);
Strip(CoverageMappingSection);
Strip(CoverageRecordsSection);
}
for (const auto &Section : OF->sections()) {
StringRef Name;
if (Expected<StringRef> NameOrErr = Section.getName()) {
Name = *NameOrErr;
} else {
consumeError(NameOrErr.takeError());
return 1;
}
if (Name == ProfileNamesSection)
ProfileNames = Section;
else if (Name == CoverageMappingSection)
CoverageMapping = Section;
else if (Name == CoverageRecordsSection)
CoverageRecords = Section;
else
continue;
++FoundSectionCount;
}
if (FoundSectionCount != 3)
return 1;
// Get the contents of the given sections.
uint64_t ProfileNamesAddress = ProfileNames.getAddress();
StringRef CoverageMappingData;
StringRef CoverageRecordsData;
StringRef ProfileNamesData;
if (Expected<StringRef> E = CoverageMapping.getContents())
CoverageMappingData = *E;
else {
consumeError(E.takeError());
return 1;
}
if (Expected<StringRef> E = CoverageRecords.getContents())
CoverageRecordsData = *E;
else {
consumeError(E.takeError());
return 1;
}
if (Expected<StringRef> E = ProfileNames.getContents())
ProfileNamesData = *E;
else {
consumeError(E.takeError());
return 1;
}
// If this is a linked PE/COFF file, then we have to skip over the null byte
// that is allocated in the .lprfn$A section in the LLVM profiling runtime.
if (isa<COFFObjectFile>(OF) && !OF->isRelocatableObject())
ProfileNamesData = ProfileNamesData.drop_front(1);
int FD;
if (auto Err = sys::fs::openFileForWrite(OutputFilename, FD)) {
errs() << "error: " << Err.message() << "\n";
return 1;
}
coverage::TestingFormatWriter Writer(ProfileNamesAddress, ProfileNamesData,
CoverageMappingData,
CoverageRecordsData);
raw_fd_ostream OS(FD, true);
Writer.write(OS);
return 0;
}
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