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Fix scope of ReadOptions in SstFileReader #7432

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Fix scope of ReadOptions in SstFileReader #7432

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24 changes: 15 additions & 9 deletions table/sst_file_reader.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@

#include "rocksdb/sst_file_reader.h"

#include "db/arena_wrapped_db_iter.h"
#include "db/db_iter.h"
#include "db/dbformat.h"
#include "env/composite_env_wrapper.h"
Expand Down Expand Up @@ -62,18 +63,23 @@ Status SstFileReader::Open(const std::string& file_path) {
return s;
}

Iterator* SstFileReader::NewIterator(const ReadOptions& options) {
Iterator* SstFileReader::NewIterator(const ReadOptions& roptions) {
auto r = rep_.get();
auto sequence = options.snapshot != nullptr
? options.snapshot->GetSequenceNumber()
auto sequence = roptions.snapshot != nullptr
? roptions.snapshot->GetSequenceNumber()
: kMaxSequenceNumber;
ArenaWrappedDBIter* res = new ArenaWrappedDBIter();
res->Init(r->options.env, roptions, r->ioptions, r->moptions, sequence,
r->moptions.max_sequential_skip_in_iterations,
0 /* version_number */, nullptr /* read_callback */,
nullptr /* db_impl */, nullptr /* cfd */, false /* allow_blob */,
false /* allow_refresh */);
auto internal_iter = r->table_reader->NewIterator(
options, r->moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kSSTFileReader);
return NewDBIterator(r->options.env, options, r->ioptions, r->moptions,
r->ioptions.user_comparator, internal_iter, sequence,
r->moptions.max_sequential_skip_in_iterations,
nullptr /* read_callback */);
res->GetReadOptions(), r->moptions.prefix_extractor.get(),
res->GetArena(), false /* skip_filters */,
TableReaderCaller::kSSTFileReader);
res->SetIterUnderDBIter(internal_iter);
return res;
}

std::shared_ptr<const TableProperties> SstFileReader::GetTableProperties()
Expand Down
25 changes: 25 additions & 0 deletions table/sst_file_reader_test.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -128,6 +128,31 @@ TEST_F(SstFileReaderTest, Uint64Comparator) {
CreateFileAndCheck(keys);
}

TEST_F(SstFileReaderTest, ReadOptionsOutOfScope) {
// Repro a bug where the SstFileReader depended on its configured ReadOptions
// outliving it.
options_.comparator = test::Uint64Comparator();
std::vector<std::string> keys;
for (uint64_t i = 0; i < kNumKeys; i++) {
keys.emplace_back(EncodeAsUint64(i));
}
CreateFile(sst_name_, keys);

SstFileReader reader(options_);
ASSERT_OK(reader.Open(sst_name_));
std::unique_ptr<Iterator> iter;
{
// Make sure ReadOptions go out of scope ASAP so we know the iterator
// operations do not depend on it.
ReadOptions ropts;
iter.reset(reader.NewIterator(ropts));
}
iter->SeekToFirst();
while (iter->Valid()) {
iter->Next();
}
}

TEST_F(SstFileReaderTest, ReadFileWithGlobalSeqno) {
std::vector<std::string> keys;
for (uint64_t i = 0; i < kNumKeys; i++) {
Expand Down