//===----------------------------------------------------------------------===//
#include "llvm/ProfileData/InstrProfWriter.h"
+#include "InstrProfIndexed.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/OnDiskHashTable.h"
-#include "InstrProfIndexed.h"
-
using namespace llvm;
namespace {
offset_type N = K.size();
LE.write<offset_type>(N);
- offset_type M = (1 + V->Counts.size()) * sizeof(uint64_t);
+ offset_type M = 0;
+ for (const auto &Counts : *V)
+ M += (2 + Counts.second.size()) * sizeof(uint64_t);
LE.write<offset_type>(M);
return std::make_pair(N, M);
offset_type) {
using namespace llvm::support;
endian::Writer<little> LE(Out);
- LE.write<uint64_t>(V->Hash);
- for (uint64_t I : V->Counts)
- LE.write<uint64_t>(I);
+
+ for (const auto &Counts : *V) {
+ LE.write<uint64_t>(Counts.first);
+ LE.write<uint64_t>(Counts.second.size());
+ for (uint64_t I : Counts.second)
+ LE.write<uint64_t>(I);
+ }
}
};
}
-error_code InstrProfWriter::addFunctionCounts(StringRef FunctionName,
- uint64_t FunctionHash,
- ArrayRef<uint64_t> Counters) {
- auto Where = FunctionData.find(FunctionName);
- if (Where == FunctionData.end()) {
- // If this is the first time we've seen this function, just add it.
- auto &Data = FunctionData[FunctionName];
- Data.Hash = FunctionHash;
- Data.Counts = Counters;
+std::error_code
+InstrProfWriter::addFunctionCounts(StringRef FunctionName,
+ uint64_t FunctionHash,
+ ArrayRef<uint64_t> Counters) {
+ auto &CounterData = FunctionData[FunctionName];
+
+ auto Where = CounterData.find(FunctionHash);
+ if (Where == CounterData.end()) {
+ // We've never seen a function with this name and hash, add it.
+ CounterData[FunctionHash] = Counters;
+ // We keep track of the max function count as we go for simplicity.
+ if (Counters[0] > MaxFunctionCount)
+ MaxFunctionCount = Counters[0];
return instrprof_error::success;
}
- auto &Data = Where->getValue();
- // We can only add to existing functions if they match, so we check the hash
- // and number of counters.
- if (Data.Hash != FunctionHash)
- return instrprof_error::hash_mismatch;
- if (Data.Counts.size() != Counters.size())
+ // We're updating a function we've seen before.
+ auto &FoundCounters = Where->second;
+ // If the number of counters doesn't match we either have bad data or a hash
+ // collision.
+ if (FoundCounters.size() != Counters.size())
return instrprof_error::count_mismatch;
- // These match, add up the counters.
+
for (size_t I = 0, E = Counters.size(); I < E; ++I) {
- if (Data.Counts[I] + Counters[I] < Data.Counts[I])
+ if (FoundCounters[I] + Counters[I] < FoundCounters[I])
return instrprof_error::counter_overflow;
- Data.Counts[I] += Counters[I];
+ FoundCounters[I] += Counters[I];
}
+ // We keep track of the max function count as we go for simplicity.
+ if (FoundCounters[0] > MaxFunctionCount)
+ MaxFunctionCount = FoundCounters[0];
+
return instrprof_error::success;
}
-void InstrProfWriter::write(raw_fd_ostream &OS) {
+std::pair<uint64_t, uint64_t> InstrProfWriter::writeImpl(raw_ostream &OS) {
OnDiskChainedHashTableGenerator<InstrProfRecordTrait> Generator;
- uint64_t MaxFunctionCount = 0;
// Populate the hash table generator.
- for (const auto &I : FunctionData) {
+ for (const auto &I : FunctionData)
Generator.insert(I.getKey(), &I.getValue());
- if (I.getValue().Counts[0] > MaxFunctionCount)
- MaxFunctionCount = I.getValue().Counts[0];
- }
using namespace llvm::support;
endian::Writer<little> LE(OS);
// Write the hash table.
uint64_t HashTableStart = Generator.Emit(OS);
+ return std::make_pair(HashTableStartLoc, HashTableStart);
+}
+
+void InstrProfWriter::write(raw_fd_ostream &OS) {
+ // Write the hash table.
+ auto TableStart = writeImpl(OS);
+
// Go back and fill in the hash table start.
- OS.seek(HashTableStartLoc);
- LE.write<uint64_t>(HashTableStart);
+ using namespace support;
+ OS.seek(TableStart.first);
+ endian::Writer<little>(OS).write<uint64_t>(TableStart.second);
+}
+
+std::unique_ptr<MemoryBuffer> InstrProfWriter::writeBuffer() {
+ std::string Data;
+ llvm::raw_string_ostream OS(Data);
+ // Write the hash table.
+ auto TableStart = writeImpl(OS);
+ OS.flush();
+
+ // Go back and fill in the hash table start.
+ using namespace support;
+ uint64_t Bytes = endian::byte_swap<uint64_t, little>(TableStart.second);
+ Data.replace(TableStart.first, sizeof(uint64_t), (const char *)&Bytes,
+ sizeof(uint64_t));
+
+ // Return this in an aligned memory buffer.
+ return MemoryBuffer::getMemBufferCopy(Data);
}