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b085ee13e0
rocksdb/table/block_based
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xinyuliu b085ee13e0 Append all characters not captured by xsputn() in overflow() function (#7991) 
Summary:
In the adapter class `WritableFileStringStreamAdapter`, which wraps WritableFile to be used for std::ostream, previouly only `std::endl` is considered a special case because `endl` is written by `os.put()` directly without going through `xsputn()`. `os.put()` will call `sputc()` and if we further check the internal implementation of `sputc()`, we will see it is
```
int_type __CLR_OR_THIS_CALL sputc(_Elem _Ch) {  // put a character
    return 0 < _Pnavail() ? _Traits::to_int_type(*_Pninc() = _Ch) : overflow(_Traits::to_int_type(_Ch));
```
As we explicitly disabled buffering, _Pnavail() is always 0. Thus every write, not captured by xsputn, becomes an overflow.

When I run tests on Windows, I found not only `std::endl` will drop into this case, writing an unsigned long long will also call `os.put()` then followed by `sputc()` and eventually call `overflow()`. Therefore, instead of only checking `std::endl`, we should try to append other characters as well unless the appending operation fails.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7991

Reviewed By: jay-zhuang

Differential Revision: D26615692

Pulled By: ajkr

fbshipit-source-id: 4c0003de1645b9531545b23df69b000e07014468
2021-02-23 21:44:48 -08:00
..
binary_search_index_reader.cc Separate internal and user key comparators in BlockIter (#6944) 2020-07-07 17:26:16 -07:00
binary_search_index_reader.h Extend Get/MultiGet deadline support to table open (#6982) 2020-06-29 14:53:17 -07:00
block_based_filter_block_test.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
block_based_filter_block.cc Exclude timestamp from prefix extractor (#7668) 2020-12-01 14:07:15 -08:00
block_based_filter_block.h Exclude timestamp from prefix extractor (#7668) 2020-12-01 14:07:15 -08:00
block_based_table_builder.cc Pick samples for compression dictionary using prime number (#7987) 2021-02-22 17:43:03 -08:00
block_based_table_builder.h Limit buffering for collecting samples for compression dictionary (#7970) 2021-02-19 14:09:54 -08:00
block_based_table_factory.cc Make BlockBasedTable::kMaxAutoReadAheadSize configurable (#7951) 2021-02-23 16:54:08 -08:00
block_based_table_factory.h Create a Customizable class to load classes and configurations (#6590) 2020-11-11 15:10:41 -08:00
block_based_table_iterator.cc Clean up InternalIterator upper bound logic a little bit (#7200) 2020-08-05 10:44:57 -07:00
block_based_table_iterator.h Exclude timestamp from prefix extractor (#7668) 2020-12-01 14:07:15 -08:00
block_based_table_reader_impl.h Divide block_based_table_reader.cc (#6527) 2020-03-12 21:41:50 -07:00
block_based_table_reader_test.cc Add a SystemClock class to capture the time functions of an Env (#7858) 2021-01-25 22:09:11 -08:00
block_based_table_reader.cc Make BlockBasedTable::kMaxAutoReadAheadSize configurable (#7951) 2021-02-23 16:54:08 -08:00
block_based_table_reader.h Append all characters not captured by xsputn() in overflow() function (#7991) 2021-02-23 21:44:48 -08:00
block_builder.cc Add pipelined & parallel compression optimization (#6262) 2020-04-01 16:40:18 -07:00
block_builder.h Add pipelined & parallel compression optimization (#6262) 2020-04-01 16:40:18 -07:00
block_prefetcher.cc Make BlockBasedTable::kMaxAutoReadAheadSize configurable (#7951) 2021-02-23 16:54:08 -08:00
block_prefetcher.h De-template block based table iterator (#6531) 2020-03-16 12:20:50 -07:00
block_prefix_index.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
block_prefix_index.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
block_test.cc More Makefile Cleanup (#7097) 2020-07-09 14:35:17 -07:00
block_type.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
block.cc Remove unused includes (#7604) 2020-10-28 23:22:27 -07:00
block.h Add EnvTestWithParam::OptionsTest to the ASSERT_STATUS_CHECKED passes (#7283) 2020-08-20 19:18:35 -07:00
cachable_entry.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
data_block_footer.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
data_block_footer.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
data_block_hash_index_test.cc Make StringEnv, StringSink, StringSource use FS classes (#7786) 2021-01-04 16:01:01 -08:00
data_block_hash_index.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
data_block_hash_index.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
filter_block_reader_common.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
filter_block_reader_common.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
filter_block.h Exclude timestamp from prefix extractor (#7668) 2020-12-01 14:07:15 -08:00
filter_policy_internal.h Support optimize_filters_for_memory for Ribbon filter (#7774) 2020-12-18 14:31:03 -08:00
filter_policy.cc Add prefetching (batched MultiGet) for experimental Ribbon filter (#7889) 2021-02-10 21:04:56 -08:00
flush_block_policy.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
flush_block_policy.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
full_filter_block_test.cc Use size_t for filter APIs, protect against overflow (#7726) 2020-12-11 22:18:12 -08:00
full_filter_block.cc Exclude timestamp from prefix extractor (#7668) 2020-12-01 14:07:15 -08:00
full_filter_block.h Exclude timestamp from prefix extractor (#7668) 2020-12-01 14:07:15 -08:00
hash_index_reader.cc Separate internal and user key comparators in BlockIter (#6944) 2020-07-07 17:26:16 -07:00
hash_index_reader.h Extend Get/MultiGet deadline support to table open (#6982) 2020-06-29 14:53:17 -07:00
index_builder.cc Move break into block (#7468) 2020-09-30 20:24:23 -07:00
index_builder.h Make db_basic_test pass assert status checked (#7452) 2020-09-29 09:49:04 -07:00
index_reader_common.cc Divide block_based_table_reader.cc (#6527) 2020-03-12 21:41:50 -07:00
index_reader_common.h Divide block_based_table_reader.cc (#6527) 2020-03-12 21:41:50 -07:00
mock_block_based_table.h For ApproximateSizes, pro-rate table metadata size over data blocks (#6784) 2020-06-02 12:30:23 -07:00
parsed_full_filter_block.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
parsed_full_filter_block.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
partitioned_filter_block_test.cc Remove unused includes (#7604) 2020-10-28 23:22:27 -07:00
partitioned_filter_block.cc Add a SystemClock class to capture the time functions of an Env (#7858) 2021-01-25 22:09:11 -08:00
partitioned_filter_block.h Return error if Get/Multi() fails in Prefetching Filter blocks (#7543) 2020-10-14 10:45:36 -07:00
partitioned_index_iterator.cc Fix misspelling of PartitionedIndexIterator (#7450) 2020-09-29 16:28:13 -07:00
partitioned_index_iterator.h Fix misspelling of PartitionedIndexIterator (#7450) 2020-09-29 16:28:13 -07:00
partitioned_index_reader.cc Add a SystemClock class to capture the time functions of an Env (#7858) 2021-01-25 22:09:11 -08:00
partitioned_index_reader.h Get() to fail with underlying failures in PartitionIndexReader::CacheDependencies() (#7297) 2020-08-25 19:01:05 -07:00
reader_common.cc Fix block checksum for >=4GB, refactor (#6978) 2020-06-19 16:18:24 -07:00
reader_common.h Bring the Configurable options together (#5753) 2020-09-14 17:01:01 -07:00
uncompression_dict_reader.cc Extend Get/MultiGet deadline support to table open (#6982) 2020-06-29 14:53:17 -07:00
uncompression_dict_reader.h Extend Get/MultiGet deadline support to table open (#6982) 2020-06-29 14:53:17 -07:00