+
+namespace llvm {
+template class RawInstrProfReader<uint32_t>;
+template class RawInstrProfReader<uint64_t>;
+}
+
+InstrProfLookupTrait::hash_value_type
+InstrProfLookupTrait::ComputeHash(StringRef K) {
+ return IndexedInstrProf::ComputeHash(HashType, K);
+}
+
+typedef InstrProfLookupTrait::data_type data_type;
+typedef InstrProfLookupTrait::offset_type offset_type;
+
+data_type InstrProfLookupTrait::ReadData(StringRef K, const unsigned char *D,
+ offset_type N) {
+
+ // Check if the data is corrupt. If so, don't try to read it.
+ if (N % sizeof(uint64_t))
+ return data_type();
+
+ DataBuffer.clear();
+ uint64_t NumCounts;
+ uint64_t NumEntries = N / sizeof(uint64_t);
+ std::vector<uint64_t> CounterBuffer;
+ for (uint64_t I = 0; I < NumEntries; I += NumCounts) {
+ using namespace support;
+ // The function hash comes first.
+ uint64_t Hash = endian::readNext<uint64_t, little, unaligned>(D);
+
+ if (++I >= NumEntries)
+ return data_type();
+
+ // In v1, we have at least one count.
+ // Later, we have the number of counts.
+ NumCounts = (1 == FormatVersion)
+ ? NumEntries - I
+ : endian::readNext<uint64_t, little, unaligned>(D);
+ if (1 != FormatVersion)
+ ++I;
+
+ // If we have more counts than data, this is bogus.
+ if (I + NumCounts > NumEntries)
+ return data_type();
+
+ CounterBuffer.clear();
+ for (unsigned J = 0; J < NumCounts; ++J)
+ CounterBuffer.push_back(endian::readNext<uint64_t, little, unaligned>(D));
+
+ DataBuffer.push_back(InstrProfRecord(K, Hash, std::move(CounterBuffer)));
+ }
+ return DataBuffer;
+}
+
+bool IndexedInstrProfReader::hasFormat(const MemoryBuffer &DataBuffer) {
+ if (DataBuffer.getBufferSize() < 8)
+ return false;
+ using namespace support;
+ uint64_t Magic =
+ endian::read<uint64_t, little, aligned>(DataBuffer.getBufferStart());
+ return Magic == IndexedInstrProf::Magic;
+}
+
+std::error_code IndexedInstrProfReader::readHeader() {
+ const unsigned char *Start =
+ (const unsigned char *)DataBuffer->getBufferStart();
+ const unsigned char *Cur = Start;
+ if ((const unsigned char *)DataBuffer->getBufferEnd() - Cur < 24)
+ return error(instrprof_error::truncated);
+
+ using namespace support;
+
+ // Check the magic number.
+ uint64_t Magic = endian::readNext<uint64_t, little, unaligned>(Cur);
+ if (Magic != IndexedInstrProf::Magic)
+ return error(instrprof_error::bad_magic);
+
+ // Read the version.
+ FormatVersion = endian::readNext<uint64_t, little, unaligned>(Cur);
+ if (FormatVersion > IndexedInstrProf::Version)
+ return error(instrprof_error::unsupported_version);
+
+ // Read the maximal function count.
+ MaxFunctionCount = endian::readNext<uint64_t, little, unaligned>(Cur);
+
+ // Read the hash type and start offset.
+ IndexedInstrProf::HashT HashType = static_cast<IndexedInstrProf::HashT>(
+ endian::readNext<uint64_t, little, unaligned>(Cur));
+ if (HashType > IndexedInstrProf::HashT::Last)
+ return error(instrprof_error::unsupported_hash_type);
+ uint64_t HashOffset = endian::readNext<uint64_t, little, unaligned>(Cur);
+
+ // The rest of the file is an on disk hash table.
+ Index.reset(InstrProfReaderIndex::Create(
+ Start + HashOffset, Cur, Start,
+ InstrProfLookupTrait(HashType, FormatVersion)));
+ // Set up our iterator for readNextRecord.
+ RecordIterator = Index->data_begin();
+
+ return success();
+}
+
+std::error_code IndexedInstrProfReader::getFunctionCounts(
+ StringRef FuncName, uint64_t FuncHash, std::vector<uint64_t> &Counts) {
+ auto Iter = Index->find(FuncName);
+ if (Iter == Index->end())
+ return error(instrprof_error::unknown_function);
+
+ // Found it. Look for counters with the right hash.
+ ArrayRef<InstrProfRecord> Data = (*Iter);
+ if (Data.empty())
+ return error(instrprof_error::malformed);
+
+ for (unsigned I = 0, E = Data.size(); I < E; ++I) {
+ // Check for a match and fill the vector if there is one.
+ if (Data[I].Hash == FuncHash) {
+ Counts = Data[I].Counts;
+ return success();
+ }
+ }
+ return error(instrprof_error::hash_mismatch);
+}
+
+std::error_code
+IndexedInstrProfReader::readNextRecord(InstrProfRecord &Record) {
+ // Are we out of records?
+ if (RecordIterator == Index->data_end())
+ return error(instrprof_error::eof);
+
+ if ((*RecordIterator).empty())
+ return error(instrprof_error::malformed);
+
+ static unsigned RecordIndex = 0;
+ ArrayRef<InstrProfRecord> Data = (*RecordIterator);
+ Record = Data[RecordIndex++];
+ if (RecordIndex >= Data.size()) {
+ ++RecordIterator;
+ RecordIndex = 0;
+ }
+ return success();
+}