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-rw-r--r--lib/ProfileData/CoverageMappingReader.cpp161
1 files changed, 89 insertions, 72 deletions
diff --git a/lib/ProfileData/CoverageMappingReader.cpp b/lib/ProfileData/CoverageMappingReader.cpp
index d32f1da..12e9e88 100644
--- a/lib/ProfileData/CoverageMappingReader.cpp
+++ b/lib/ProfileData/CoverageMappingReader.cpp
@@ -14,9 +14,12 @@
#include "llvm/ProfileData/CoverageMappingReader.h"
#include "llvm/ADT/DenseSet.h"
+#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/Endian.h"
#include "llvm/Support/LEB128.h"
+#include "llvm/Support/raw_ostream.h"
using namespace llvm;
using namespace coverage;
@@ -287,24 +290,6 @@ std::error_code RawCoverageMappingReader::read() {
}
namespace {
-/// \brief The coverage mapping data for a single function.
-/// It points to the function's name.
-template <typename IntPtrT> struct CoverageMappingFunctionRecord {
- IntPtrT FunctionNamePtr;
- uint32_t FunctionNameSize;
- uint32_t CoverageMappingSize;
- uint64_t FunctionHash;
-};
-
-/// \brief The coverage mapping data for a single translation unit.
-/// It points to the array of function coverage mapping records and the encoded
-/// filenames array.
-template <typename IntPtrT> struct CoverageMappingTURecord {
- uint32_t FunctionRecordsSize;
- uint32_t FilenamesSize;
- uint32_t CoverageMappingsSize;
- uint32_t Version;
-};
/// \brief A helper structure to access the data from a section
/// in an object file.
@@ -331,77 +316,76 @@ struct SectionData {
};
}
-template <typename T>
+template <typename T, support::endianness Endian>
std::error_code readCoverageMappingData(
SectionData &ProfileNames, StringRef Data,
std::vector<BinaryCoverageReader::ProfileMappingRecord> &Records,
std::vector<StringRef> &Filenames) {
+ using namespace support;
llvm::DenseSet<T> UniqueFunctionMappingData;
// Read the records in the coverage data section.
- while (!Data.empty()) {
- if (Data.size() < sizeof(CoverageMappingTURecord<T>))
+ for (const char *Buf = Data.data(), *End = Buf + Data.size(); Buf < End;) {
+ if (Buf + 4 * sizeof(uint32_t) > End)
return instrprof_error::malformed;
- auto TU = reinterpret_cast<const CoverageMappingTURecord<T> *>(Data.data());
- Data = Data.substr(sizeof(CoverageMappingTURecord<T>));
- switch (TU->Version) {
+ uint32_t NRecords = endian::readNext<uint32_t, Endian, unaligned>(Buf);
+ uint32_t FilenamesSize = endian::readNext<uint32_t, Endian, unaligned>(Buf);
+ uint32_t CoverageSize = endian::readNext<uint32_t, Endian, unaligned>(Buf);
+ uint32_t Version = endian::readNext<uint32_t, Endian, unaligned>(Buf);
+
+ switch (Version) {
case CoverageMappingVersion1:
break;
default:
return instrprof_error::unsupported_version;
}
- auto Version = CoverageMappingVersion(TU->Version);
- // Get the function records.
- auto FunctionRecords =
- reinterpret_cast<const CoverageMappingFunctionRecord<T> *>(Data.data());
- if (Data.size() <
- sizeof(CoverageMappingFunctionRecord<T>) * TU->FunctionRecordsSize)
- return instrprof_error::malformed;
- Data = Data.substr(sizeof(CoverageMappingFunctionRecord<T>) *
- TU->FunctionRecordsSize);
+ // 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));
+ const char *FunEnd = Buf;
// Get the filenames.
- if (Data.size() < TU->FilenamesSize)
+ if (Buf + FilenamesSize > End)
return instrprof_error::malformed;
- auto RawFilenames = Data.substr(0, TU->FilenamesSize);
- Data = Data.substr(TU->FilenamesSize);
size_t FilenamesBegin = Filenames.size();
- RawCoverageFilenamesReader Reader(RawFilenames, Filenames);
+ RawCoverageFilenamesReader Reader(StringRef(Buf, FilenamesSize), Filenames);
if (auto Err = Reader.read())
return Err;
+ Buf += FilenamesSize;
- // Get the coverage mappings.
- if (Data.size() < TU->CoverageMappingsSize)
+ // We'll read the coverage mapping records in the loop below.
+ const char *CovBuf = Buf;
+ Buf += CoverageSize;
+ const char *CovEnd = Buf;
+ if (Buf > End)
return instrprof_error::malformed;
- auto CoverageMappings = Data.substr(0, TU->CoverageMappingsSize);
- Data = Data.substr(TU->CoverageMappingsSize);
- for (unsigned I = 0; I < TU->FunctionRecordsSize; ++I) {
- auto &MappingRecord = FunctionRecords[I];
+ while (FunBuf < FunEnd) {
+ // Read the function information
+ T NamePtr = endian::readNext<T, Endian, unaligned>(FunBuf);
+ uint32_t NameSize = endian::readNext<uint32_t, Endian, unaligned>(FunBuf);
+ uint32_t DataSize = endian::readNext<uint32_t, Endian, unaligned>(FunBuf);
+ uint64_t FuncHash = endian::readNext<uint64_t, Endian, unaligned>(FunBuf);
- // Get the coverage mapping.
- if (CoverageMappings.size() < MappingRecord.CoverageMappingSize)
+ // Now use that to read the coverage data.
+ if (CovBuf + DataSize > CovEnd)
return instrprof_error::malformed;
- auto Mapping =
- CoverageMappings.substr(0, MappingRecord.CoverageMappingSize);
- CoverageMappings =
- CoverageMappings.substr(MappingRecord.CoverageMappingSize);
+ auto Mapping = StringRef(CovBuf, DataSize);
+ CovBuf += DataSize;
// Ignore this record if we already have a record that points to the same
- // function name.
- // This is useful to ignore the redundant records for the functions
- // with ODR linkage.
- if (!UniqueFunctionMappingData.insert(MappingRecord.FunctionNamePtr)
- .second)
+ // function name. This is useful to ignore the redundant records for the
+ // functions with ODR linkage.
+ if (!UniqueFunctionMappingData.insert(NamePtr).second)
continue;
- StringRef FunctionName;
- if (auto Err =
- ProfileNames.get(MappingRecord.FunctionNamePtr,
- MappingRecord.FunctionNameSize, FunctionName))
- return Err;
+
+ // Finally, grab the name and create a record.
+ StringRef FuncName;
+ if (std::error_code EC = ProfileNames.get(NamePtr, NameSize, FuncName))
+ return EC;
Records.push_back(BinaryCoverageReader::ProfileMappingRecord(
- Version, FunctionName, MappingRecord.FunctionHash, Mapping,
+ CoverageMappingVersion(Version), FuncName, FuncHash, Mapping,
FilenamesBegin, Filenames.size() - FilenamesBegin));
}
}
@@ -414,8 +398,10 @@ static const char *TestingFormatMagic = "llvmcovmtestdata";
static std::error_code loadTestingFormat(StringRef Data,
SectionData &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)
@@ -444,12 +430,35 @@ static std::error_code loadTestingFormat(StringRef Data,
static std::error_code loadBinaryFormat(MemoryBufferRef ObjectBuffer,
SectionData &ProfileNames,
StringRef &CoverageMapping,
- uint8_t &BytesInAddress) {
- auto ObjectFileOrErr = object::ObjectFile::createObjectFile(ObjectBuffer);
- if (std::error_code EC = ObjectFileOrErr.getError())
+ uint8_t &BytesInAddress,
+ support::endianness &Endian,
+ Triple::ArchType Arch) {
+ auto BinOrErr = object::createBinary(ObjectBuffer);
+ if (std::error_code EC = BinOrErr.getError())
return EC;
- auto OF = std::move(ObjectFileOrErr.get());
+ auto Bin = std::move(BinOrErr.get());
+ std::unique_ptr<ObjectFile> OF;
+ if (auto *Universal = dyn_cast<object::MachOUniversalBinary>(Bin.get())) {
+ // If we have a universal binary, try to look up the object for the
+ // appropriate architecture.
+ auto ObjectFileOrErr = Universal->getObjectForArch(Arch);
+ if (std::error_code EC = ObjectFileOrErr.getError())
+ return EC;
+ OF = std::move(ObjectFileOrErr.get());
+ } else if (isa<object::ObjectFile>(Bin.get())) {
+ // 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)
+ return object_error::arch_not_found;
+ } else
+ // We can only handle object files.
+ return instrprof_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;
@@ -479,28 +488,36 @@ static std::error_code loadBinaryFormat(MemoryBufferRef ObjectBuffer,
}
ErrorOr<std::unique_ptr<BinaryCoverageReader>>
-BinaryCoverageReader::create(std::unique_ptr<MemoryBuffer> &ObjectBuffer) {
+BinaryCoverageReader::create(std::unique_ptr<MemoryBuffer> &ObjectBuffer,
+ Triple::ArchType Arch) {
std::unique_ptr<BinaryCoverageReader> Reader(new BinaryCoverageReader());
SectionData Profile;
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);
+ BytesInAddress, Endian);
else
EC = loadBinaryFormat(ObjectBuffer->getMemBufferRef(), Profile, Coverage,
- BytesInAddress);
+ BytesInAddress, Endian, Arch);
if (EC)
return EC;
- if (BytesInAddress == 4)
- EC = readCoverageMappingData<uint32_t>(
+ if (BytesInAddress == 4 && Endian == support::endianness::little)
+ EC = readCoverageMappingData<uint32_t, support::endianness::little>(
+ Profile, Coverage, Reader->MappingRecords, Reader->Filenames);
+ else if (BytesInAddress == 4 && Endian == support::endianness::big)
+ EC = readCoverageMappingData<uint32_t, support::endianness::big>(
+ Profile, Coverage, Reader->MappingRecords, Reader->Filenames);
+ else if (BytesInAddress == 8 && Endian == support::endianness::little)
+ EC = readCoverageMappingData<uint64_t, support::endianness::little>(
Profile, Coverage, Reader->MappingRecords, Reader->Filenames);
- else if (BytesInAddress == 8)
- EC = readCoverageMappingData<uint64_t>(
+ else if (BytesInAddress == 8 && Endian == support::endianness::big)
+ EC = readCoverageMappingData<uint64_t, support::endianness::big>(
Profile, Coverage, Reader->MappingRecords, Reader->Filenames);
else
return instrprof_error::malformed;
generated by cgit v1.1 at 2024-05-18 01:22:33 +0000