#include "llvm/Support/Debug.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/LEB128.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/raw_ostream.h"
using namespace llvm;
using namespace coverage;
std::error_code RawCoverageReader::readULEB128(uint64_t &Result) {
if (Data.size() < 1)
- return error(instrprof_error::truncated);
+ return coveragemap_error::truncated;
unsigned N = 0;
Result = decodeULEB128(reinterpret_cast<const uint8_t *>(Data.data()), &N);
if (N > Data.size())
- return error(instrprof_error::malformed);
+ return coveragemap_error::malformed;
Data = Data.substr(N);
- return success();
+ return std::error_code();
}
std::error_code RawCoverageReader::readIntMax(uint64_t &Result,
if (auto Err = readULEB128(Result))
return Err;
if (Result >= MaxPlus1)
- return error(instrprof_error::malformed);
- return success();
+ return coveragemap_error::malformed;
+ return std::error_code();
}
std::error_code RawCoverageReader::readSize(uint64_t &Result) {
return Err;
// Sanity check the number.
if (Result > Data.size())
- return error(instrprof_error::malformed);
- return success();
+ return coveragemap_error::malformed;
+ return std::error_code();
}
std::error_code RawCoverageReader::readString(StringRef &Result) {
return Err;
Result = Data.substr(0, Length);
Data = Data.substr(Length);
- return success();
+ return std::error_code();
}
std::error_code RawCoverageFilenamesReader::read() {
return Err;
Filenames.push_back(Filename);
}
- return success();
+ return std::error_code();
}
std::error_code RawCoverageMappingReader::decodeCounter(unsigned Value,
switch (Tag) {
case Counter::Zero:
C = Counter::getZero();
- return success();
+ return std::error_code();
case Counter::CounterValueReference:
C = Counter::getCounter(Value >> Counter::EncodingTagBits);
- return success();
+ return std::error_code();
default:
break;
}
case CounterExpression::Add: {
auto ID = Value >> Counter::EncodingTagBits;
if (ID >= Expressions.size())
- return error(instrprof_error::malformed);
+ return coveragemap_error::malformed;
Expressions[ID].Kind = CounterExpression::ExprKind(Tag);
C = Counter::getExpression(ID);
break;
}
default:
- return error(instrprof_error::malformed);
+ return coveragemap_error::malformed;
}
- return success();
+ return std::error_code();
}
std::error_code RawCoverageMappingReader::readCounter(Counter &C) {
return Err;
if (auto Err = decodeCounter(EncodedCounter, C))
return Err;
- return success();
+ return std::error_code();
}
static const unsigned EncodingExpansionRegionBit = 1
ExpandedFileID = EncodedCounterAndRegion >>
Counter::EncodingCounterTagAndExpansionRegionTagBits;
if (ExpandedFileID >= NumFileIDs)
- return error(instrprof_error::malformed);
+ return coveragemap_error::malformed;
} else {
switch (EncodedCounterAndRegion >>
Counter::EncodingCounterTagAndExpansionRegionTagBits) {
Kind = CounterMappingRegion::SkippedRegion;
break;
default:
- return error(instrprof_error::malformed);
+ return coveragemap_error::malformed;
}
}
}
if (auto Err = readULEB128(ColumnStart))
return Err;
if (ColumnStart > std::numeric_limits<unsigned>::max())
- return error(instrprof_error::malformed);
+ return coveragemap_error::malformed;
if (auto Err = readIntMax(NumLines, std::numeric_limits<unsigned>::max()))
return Err;
if (auto Err = readIntMax(ColumnEnd, std::numeric_limits<unsigned>::max()))
C, InferredFileID, ExpandedFileID, LineStart, ColumnStart,
LineStart + NumLines, ColumnEnd, Kind));
}
- return success();
+ return std::error_code();
}
std::error_code RawCoverageMappingReader::read() {
}
}
- return success();
+ return std::error_code();
}
-namespace {
-
-/// \brief A helper structure to access the data from a section
-/// in an object file.
-struct SectionData {
- StringRef Data;
- uint64_t Address;
-
- std::error_code load(SectionRef &Section) {
- if (auto Err = Section.getContents(Data))
- return Err;
- Address = Section.getAddress();
- return instrprof_error::success;
- }
+std::error_code InstrProfSymtab::create(SectionRef &Section) {
+ if (auto Err = Section.getContents(Data))
+ return Err;
+ Address = Section.getAddress();
+ return std::error_code();
+}
- std::error_code get(uint64_t Pointer, size_t Size, StringRef &Result) {
- if (Pointer < Address)
- return instrprof_error::malformed;
- auto Offset = Pointer - Address;
- if (Offset + Size > Data.size())
- return instrprof_error::malformed;
- Result = Data.substr(Pointer - Address, Size);
- return instrprof_error::success;
- }
-};
+StringRef InstrProfSymtab::getFuncName(uint64_t Pointer, size_t Size) {
+ if (Pointer < Address)
+ return StringRef();
+ auto Offset = Pointer - Address;
+ if (Offset + Size > Data.size())
+ return StringRef();
+ return Data.substr(Pointer - Address, Size);
}
-template <typename T>
-std::error_code readCoverageMappingData(
- SectionData &ProfileNames, StringRef Data,
+template <typename T, support::endianness Endian>
+static std::error_code readCoverageMappingData(
+ InstrProfSymtab &ProfileNames, StringRef Data,
std::vector<BinaryCoverageReader::ProfileMappingRecord> &Records,
std::vector<StringRef> &Filenames) {
using namespace support;
// Read the records in the coverage data section.
for (const char *Buf = Data.data(), *End = Buf + Data.size(); Buf < End;) {
- if (Buf + 4 * sizeof(uint32_t) > End)
- return instrprof_error::malformed;
- uint32_t NRecords = endian::readNext<uint32_t, little, unaligned>(Buf);
- uint32_t FilenamesSize = endian::readNext<uint32_t, little, unaligned>(Buf);
- uint32_t CoverageSize = endian::readNext<uint32_t, little, unaligned>(Buf);
- uint32_t Version = endian::readNext<uint32_t, little, unaligned>(Buf);
-
- switch (Version) {
- case CoverageMappingVersion1:
- break;
- default:
- return instrprof_error::unsupported_version;
- }
+ if (Buf + sizeof(CovMapHeader) > End)
+ return coveragemap_error::malformed;
+ auto CovHeader = reinterpret_cast<const coverage::CovMapHeader *>(Buf);
+ uint32_t NRecords =
+ endian::byte_swap<uint32_t, Endian>(CovHeader->NRecords);
+ uint32_t FilenamesSize =
+ endian::byte_swap<uint32_t, Endian>(CovHeader->FilenamesSize);
+ uint32_t CoverageSize =
+ endian::byte_swap<uint32_t, Endian>(CovHeader->CoverageSize);
+ uint32_t Version = endian::byte_swap<uint32_t, Endian>(CovHeader->Version);
+ Buf = reinterpret_cast<const char *>(++CovHeader);
+
+ if (Version > coverage::CoverageMappingCurrentVersion)
+ return coveragemap_error::unsupported_version;
// Skip past the function records, saving the start and end for later.
const char *FunBuf = Buf;
- Buf += NRecords * (sizeof(T) + 2 * sizeof(uint32_t) + sizeof(uint64_t));
+ Buf += NRecords * sizeof(coverage::CovMapFunctionRecord<T>);
const char *FunEnd = Buf;
// Get the filenames.
if (Buf + FilenamesSize > End)
- return instrprof_error::malformed;
+ return coveragemap_error::malformed;
size_t FilenamesBegin = Filenames.size();
RawCoverageFilenamesReader Reader(StringRef(Buf, FilenamesSize), Filenames);
if (auto Err = Reader.read())
const char *CovBuf = Buf;
Buf += CoverageSize;
const char *CovEnd = Buf;
- if (Buf > End)
- return instrprof_error::malformed;
- while (FunBuf < FunEnd) {
+ if (Buf > End)
+ return coveragemap_error::malformed;
+ // Each coverage map has an alignment of 8, so we need to adjust alignment
+ // before reading the next map.
+ Buf += alignmentAdjustment(Buf, 8);
+
+ auto CFR =
+ reinterpret_cast<const coverage::CovMapFunctionRecord<T> *>(FunBuf);
+ while ((const char *)CFR < FunEnd) {
// Read the function information
- T NamePtr = endian::readNext<T, little, unaligned>(FunBuf);
- uint32_t NameSize = endian::readNext<uint32_t, little, unaligned>(FunBuf);
- uint32_t DataSize = endian::readNext<uint32_t, little, unaligned>(FunBuf);
- uint64_t FuncHash = endian::readNext<uint64_t, little, unaligned>(FunBuf);
+ T NamePtr = endian::byte_swap<T, Endian>(CFR->NamePtr);
+ uint32_t NameSize = endian::byte_swap<uint32_t, Endian>(CFR->NameSize);
+ uint32_t DataSize = endian::byte_swap<uint32_t, Endian>(CFR->DataSize);
+ uint64_t FuncHash = endian::byte_swap<uint64_t, Endian>(CFR->FuncHash);
+ CFR++;
// Now use that to read the coverage data.
if (CovBuf + DataSize > CovEnd)
- return instrprof_error::malformed;
+ return coveragemap_error::malformed;
auto Mapping = StringRef(CovBuf, DataSize);
CovBuf += DataSize;
continue;
// Finally, grab the name and create a record.
- StringRef FuncName;
- if (std::error_code EC = ProfileNames.get(NamePtr, NameSize, FuncName))
- return EC;
+ StringRef FuncName = ProfileNames.getFuncName(NamePtr, NameSize);
+ if (NameSize && FuncName.empty())
+ return coveragemap_error::malformed;
Records.push_back(BinaryCoverageReader::ProfileMappingRecord(
CoverageMappingVersion(Version), FuncName, FuncHash, Mapping,
FilenamesBegin, Filenames.size() - FilenamesBegin));
}
}
- return instrprof_error::success;
+ return std::error_code();
}
static const char *TestingFormatMagic = "llvmcovmtestdata";
static std::error_code loadTestingFormat(StringRef Data,
- SectionData &ProfileNames,
+ InstrProfSymtab &ProfileNames,
StringRef &CoverageMapping,
- uint8_t &BytesInAddress) {
+ uint8_t &BytesInAddress,
+ support::endianness &Endian) {
BytesInAddress = 8;
+ Endian = support::endianness::little;
Data = Data.substr(StringRef(TestingFormatMagic).size());
if (Data.size() < 1)
- return instrprof_error::truncated;
+ return coveragemap_error::truncated;
unsigned N = 0;
auto ProfileNamesSize =
decodeULEB128(reinterpret_cast<const uint8_t *>(Data.data()), &N);
if (N > Data.size())
- return instrprof_error::malformed;
+ return coveragemap_error::malformed;
Data = Data.substr(N);
if (Data.size() < 1)
- return instrprof_error::truncated;
+ return coveragemap_error::truncated;
N = 0;
- ProfileNames.Address =
+ uint64_t Address =
decodeULEB128(reinterpret_cast<const uint8_t *>(Data.data()), &N);
if (N > Data.size())
- return instrprof_error::malformed;
+ return coveragemap_error::malformed;
Data = Data.substr(N);
if (Data.size() < ProfileNamesSize)
- return instrprof_error::malformed;
- ProfileNames.Data = Data.substr(0, ProfileNamesSize);
+ return coveragemap_error::malformed;
+ ProfileNames.create(Data.substr(0, ProfileNamesSize), Address);
CoverageMapping = Data.substr(ProfileNamesSize);
- return instrprof_error::success;
+ return std::error_code();
}
-static std::error_code loadBinaryFormat(MemoryBufferRef ObjectBuffer,
- SectionData &ProfileNames,
- StringRef &CoverageMapping,
- uint8_t &BytesInAddress,
- Triple::ArchType Arch) {
+static ErrorOr<SectionRef> lookupSection(ObjectFile &OF, StringRef Name) {
+ StringRef FoundName;
+ for (const auto &Section : OF.sections()) {
+ if (auto EC = Section.getName(FoundName))
+ return EC;
+ if (FoundName == Name)
+ return Section;
+ }
+ return coveragemap_error::no_data_found;
+}
+
+static std::error_code
+loadBinaryFormat(MemoryBufferRef ObjectBuffer, InstrProfSymtab &ProfileNames,
+ StringRef &CoverageMapping, uint8_t &BytesInAddress,
+ support::endianness &Endian, StringRef Arch) {
auto BinOrErr = object::createBinary(ObjectBuffer);
if (std::error_code EC = BinOrErr.getError())
return EC;
// For any other object file, upcast and take ownership.
OF.reset(cast<object::ObjectFile>(Bin.release()));
// If we've asked for a particular arch, make sure they match.
- if (Arch != Triple::ArchType::UnknownArch && OF->getArch() != Arch)
+ if (!Arch.empty() && OF->getArch() != Triple(Arch).getArch())
return object_error::arch_not_found;
} else
// We can only handle object files.
- return instrprof_error::malformed;
+ return coveragemap_error::malformed;
// The coverage uses native pointer sizes for the object it's written in.
BytesInAddress = OF->getBytesInAddress();
+ Endian = OF->isLittleEndian() ? support::endianness::little
+ : support::endianness::big;
// Look for the sections that we are interested in.
- int FoundSectionCount = 0;
- SectionRef NamesSection, CoverageSection;
- for (const auto &Section : OF->sections()) {
- StringRef Name;
- if (auto Err = Section.getName(Name))
- return Err;
- if (Name == "__llvm_prf_names") {
- NamesSection = Section;
- } else if (Name == "__llvm_covmap") {
- CoverageSection = Section;
- } else
- continue;
- ++FoundSectionCount;
- }
- if (FoundSectionCount != 2)
- return instrprof_error::bad_header;
+ auto NamesSection = lookupSection(*OF, getInstrProfNameSectionName(false));
+ if (auto EC = NamesSection.getError())
+ return EC;
+ auto CoverageSection =
+ lookupSection(*OF, getInstrProfCoverageSectionName(false));
+ if (auto EC = CoverageSection.getError())
+ return EC;
// Get the contents of the given sections.
- if (std::error_code EC = CoverageSection.getContents(CoverageMapping))
+ if (std::error_code EC = CoverageSection->getContents(CoverageMapping))
return EC;
- if (std::error_code EC = ProfileNames.load(NamesSection))
+ if (std::error_code EC = ProfileNames.create(*NamesSection))
return EC;
return std::error_code();
ErrorOr<std::unique_ptr<BinaryCoverageReader>>
BinaryCoverageReader::create(std::unique_ptr<MemoryBuffer> &ObjectBuffer,
- Triple::ArchType Arch) {
+ StringRef Arch) {
std::unique_ptr<BinaryCoverageReader> Reader(new BinaryCoverageReader());
- SectionData Profile;
+ InstrProfSymtab ProfileNames;
StringRef Coverage;
uint8_t BytesInAddress;
+ support::endianness Endian;
std::error_code EC;
if (ObjectBuffer->getBuffer().startswith(TestingFormatMagic))
// This is a special format used for testing.
- EC = loadTestingFormat(ObjectBuffer->getBuffer(), Profile, Coverage,
- BytesInAddress);
+ EC = loadTestingFormat(ObjectBuffer->getBuffer(), ProfileNames, Coverage,
+ BytesInAddress, Endian);
else
- EC = loadBinaryFormat(ObjectBuffer->getMemBufferRef(), Profile, Coverage,
- BytesInAddress, Arch);
+ EC = loadBinaryFormat(ObjectBuffer->getMemBufferRef(), ProfileNames,
+ Coverage, BytesInAddress, Endian, Arch);
if (EC)
return EC;
- if (BytesInAddress == 4)
- EC = readCoverageMappingData<uint32_t>(
- Profile, Coverage, Reader->MappingRecords, Reader->Filenames);
- else if (BytesInAddress == 8)
- EC = readCoverageMappingData<uint64_t>(
- Profile, Coverage, Reader->MappingRecords, Reader->Filenames);
+ if (BytesInAddress == 4 && Endian == support::endianness::little)
+ EC = readCoverageMappingData<uint32_t, support::endianness::little>(
+ ProfileNames, Coverage, Reader->MappingRecords, Reader->Filenames);
+ else if (BytesInAddress == 4 && Endian == support::endianness::big)
+ EC = readCoverageMappingData<uint32_t, support::endianness::big>(
+ ProfileNames, Coverage, Reader->MappingRecords, Reader->Filenames);
+ else if (BytesInAddress == 8 && Endian == support::endianness::little)
+ EC = readCoverageMappingData<uint64_t, support::endianness::little>(
+ ProfileNames, Coverage, Reader->MappingRecords, Reader->Filenames);
+ else if (BytesInAddress == 8 && Endian == support::endianness::big)
+ EC = readCoverageMappingData<uint64_t, support::endianness::big>(
+ ProfileNames, Coverage, Reader->MappingRecords, Reader->Filenames);
else
- return instrprof_error::malformed;
+ return coveragemap_error::malformed;
if (EC)
return EC;
return std::move(Reader);
std::error_code
BinaryCoverageReader::readNextRecord(CoverageMappingRecord &Record) {
if (CurrentRecord >= MappingRecords.size())
- return instrprof_error::eof;
+ return coveragemap_error::eof;
FunctionsFilenames.clear();
Expressions.clear();
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