andreacavalli/rocksdb
0
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Fix the logic of setting read_amp_bytes_per_bit from OPTIONS file (#7680)

Browse Source 
Summary:
Instead of using `EncodeFixed32` which always serialize a integer to
little endian, we should use the local machine's endianness when
populating a native data structure during options parsing.
Without this fix, `read_amp_bytes_per_bit` may be populated incorrectly
on big-endian machines.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7680

Test Plan: make check

Reviewed By: pdillinger

Differential Revision: D24999166

Pulled By: riversand963

fbshipit-source-id: dc603cff6e17f8fa32479ce6df93b93082e6b0c4
This commit is contained in:
Yanqin Jin 2020-11-17 00:43:20 -08:00
parent 910ea96ff7
commit a21a78a3cf
2 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
HISTORY.md
View File

@ -1,7 +1,8 @@
# Rocksdb Change Log
## 6.10.4 (11/15/2020)
### Bug fix
* Fix a bug of encoding and parsing BlockBasedTableOptions::read_amp_bytes_per_bit as a 64-bit integer.
### Bug Fixes
* Fixed a bug of encoding and parsing BlockBasedTableOptions::read_amp_bytes_per_bit as a 64-bit integer.
* Fixed the logic of populating native data structure for `read_amp_bytes_per_bit` during OPTIONS file parsing on big-endian architecture. Without this fix, original code introduced in PR7659, when running on big-endian machine, can mistakenly store read_amp_bytes_per_bit (an uint32) in little endian format. Future access to `read_amp_bytes_per_bit` will give wrong values. Little endian architecture is not affected.
## 6.10.3 (6/16/2020)
### Bug fix

3
table/block_based/block_based_table_factory.cc
View File

@ -314,7 +314,8 @@ static std::unordered_map<std::string, OptionTypeInfo>
// generated by affected releases before the fix, we need to
// manually parse read_amp_bytes_per_bit with this special hack.
uint64_t read_amp_bytes_per_bit = ParseUint64(value);
EncodeFixed32(addr, static_cast<uint32_t>(read_amp_bytes_per_bit));
*(reinterpret_cast<uint32_t*>(addr)) =
static_cast<uint32_t>(read_amp_bytes_per_bit);
return Status::OK();
}}},
{"enable_index_compression",