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62f7a1be4f
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Igor Sugak 62f7a1be4f rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings 
Summary:
This diff contains trivial fixes for 6 scan-build warnings:

**db/c_test.c**
`db` variable is never read. Removed assignment.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-9b77d2.html#EndPath

**db/db_iter.cc**
`skipping` local variable is assigned to false. Then in the next switch block the only "non return" case assign `skipping` to true, the rest cases don't use it and all do return.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-13fca7.html#EndPath

**db/log_reader.cc**
In `bool Reader::SkipToInitialBlock()` `offset_in_block` local variable is assigned to 0 `if (offset_in_block > kBlockSize - 6)` and then never used. Removed the assignment and renamed it to `initial_offset_in_block` to avoid confusion.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-a618dd.html#EndPath

In `bool Reader::ReadRecord(Slice* record, std::string* scratch)` local variable `in_fragmented_record` in switch case `kFullType` block is assigned to false and then does `return` without use. In the other switch case `kFirstType` block the same `in_fragmented_record` is assigned to false, but later assigned to true without prior use. Removed assignment for both cases.
scan-build reprots:
http://home.fburl.com/~sugak/latest20/report-bb86b0.html#EndPath
http://home.fburl.com/~sugak/latest20/report-a975be.html#EndPath

**table/plain_table_key_coding.cc**
Local variable `user_key_size` is assigned when declared. But then in both places where it is used assigned to `static_cast<uint32_t>(key.size() - 8)`. Changed to initialize the variable to the proper value in declaration.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-9e6b86.html#EndPath

**tools/db_stress.cc**
Missing `break` in switch case block. This seems to be a bug. Added missing `break`.

Test Plan:
Make sure all tests are passing and scan-build does not report 'Dead assignment' and 'Dead initialization' bugs.
```lang=bash
% make check
% make analyze
```

Reviewers: meyering, igor, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D33795
2015-02-23 14:10:09 -08:00
..
builder.cc Turn on -Wshadow 2014-10-31 11:59:54 -07:00
builder.h introduce ImmutableOptions 2014-09-04 16:18:36 -07:00
c_test.c rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings 2015-02-23 14:10:09 -08:00
c.cc maint: remove extraneous "const" attribute from return type 2015-02-20 11:07:07 -08:00
column_family_test.cc Improve scalability of DB::GetSnapshot() 2014-12-11 13:27:57 -08:00
column_family.cc Add rocksdb.num-live-versions: number of live versions 2015-02-19 13:10:37 -08:00
column_family.h Add rocksdb.num-live-versions: number of live versions 2015-02-19 13:10:37 -08:00
compaction_job_test.cc Introduce job_id for flush and compaction 2015-02-12 09:54:48 -08:00
compaction_job.cc Allow GetThreadList to reflect flush activity. 2015-02-17 10:13:52 -08:00
compaction_job.h Introduce job_id for flush and compaction 2015-02-12 09:54:48 -08:00
compaction_picker_test.cc Switch logv with loglevel to virtual 2015-02-09 20:59:29 +01:00
compaction_picker.cc Fix data race #3 2015-02-04 16:04:51 -08:00
compaction_picker.h Fix data race #3 2015-02-04 16:04:51 -08:00
compaction.cc Remove Compaction::ReleaseInputs(). 2015-01-15 12:44:19 -08:00
compaction.h inputs: restore "const" attribute removed by D33759 2015-02-20 11:52:20 -08:00
comparator_db_test.cc Add rocksdb::ToString() to address cases where std::to_string is not available. 2014-11-24 20:44:49 -08:00
corruption_test.cc Fail DB::Open() on WAL corruption 2015-01-05 10:26:34 -08:00
cuckoo_table_db_test.cc remove unreliable test in db/cuckoo_table_db_test.cc 2014-11-24 15:18:09 -08:00
db_bench.cc rocksdb: Fix scan-build bug 'Memory leak' in db/db_bench.cc 2015-02-19 14:27:48 -08:00
db_filesnapshot.cc Introduce job_id for flush and compaction 2015-02-12 09:54:48 -08:00
db_impl_debug.cc Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
db_impl_readonly.cc Move GetThreadList() feature under Env. 2014-12-22 12:20:17 -08:00
db_impl_readonly.h Block ReadOnlyDB in ROCKSDB_LITE 2014-11-26 11:37:59 -08:00
db_impl.cc build: do not relink every single binary just for a timestamp 2015-02-19 13:11:10 -08:00
db_impl.h Introduce job_id for flush and compaction 2015-02-12 09:54:48 -08:00
db_iter_test.cc Divide test DBIteratorTest.DBIterator to smaller tests 2015-02-03 09:48:03 -08:00
db_iter.cc rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings 2015-02-23 14:10:09 -08:00
db_iter.h reduce references to cfd->options() in DBImpl 2014-09-08 15:04:34 -07:00
db_test.cc Add rocksdb.num-live-versions: number of live versions 2015-02-19 13:10:37 -08:00
dbformat_test.cc Use IterKey instead of string in Block::Iter to reduce malloc 2014-07-23 12:31:11 -07:00
dbformat.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
dbformat.h Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
deletefile_test.cc Add rocksdb::ToString() to address cases where std::to_string is not available. 2014-11-24 20:44:49 -08:00
fault_injection_test.cc fault_injection_test: add a unit test to allow parallel compactions and multiple levels 2015-01-28 14:07:25 -08:00
file_indexer_test.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
file_indexer.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
file_indexer.h Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
filename_test.cc Support purging logs from separate log directory 2014-08-14 13:22:50 -07:00
filename.cc Sync manifest file when initializing it 2015-01-22 14:32:03 -08:00
filename.h Sync manifest file when initializing it 2015-01-22 14:32:03 -08:00
flush_job_test.cc Introduce job_id for flush and compaction 2015-02-12 09:54:48 -08:00
flush_job.cc Allow GetThreadList to reflect flush activity. 2015-02-17 10:13:52 -08:00
flush_job.h Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
flush_scheduler.cc Don't return (or dereference) dangling pointer 2014-10-02 14:33:16 -07:00
flush_scheduler.h Fix data race #1 2015-01-26 11:48:07 -08:00
forward_iterator.cc Introduce job_id for flush and compaction 2015-02-12 09:54:48 -08:00
forward_iterator.h Make ForwardIterator::status() more efficient 2014-11-10 15:44:20 -08:00
internal_stats.cc Add rocksdb.num-live-versions: number of live versions 2015-02-19 13:10:37 -08:00
internal_stats.h Add rocksdb.num-live-versions: number of live versions 2015-02-19 13:10:37 -08:00
job_context.h Introduce job_id for flush and compaction 2015-02-12 09:54:48 -08:00
listener_test.cc Fixed a compile warning in clang in db/listener_test.cc 2015-01-27 15:01:04 -08:00
log_and_apply_bench.cc Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
log_format.h Some minor refactoring on the code 2014-01-02 16:32:31 -08:00
log_reader.cc rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings 2015-02-23 14:10:09 -08:00
log_reader.h Fix UnmarkEOF for partial blocks 2014-01-27 14:49:10 -08:00
log_test.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
log_writer.cc fix erroneous assert: cast kBlockSize (of type unsigned int) to "int" 2015-02-20 11:07:17 -08:00
log_writer.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
managed_iterator.cc Managed iterator 2015-02-18 11:49:31 -08:00
managed_iterator.h Managed iterator 2015-02-18 11:49:31 -08:00
memtable_allocator.cc Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
memtable_allocator.h Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
memtable_list.cc Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
memtable_list.h Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
memtable.cc Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
memtable.h Changes for supporting cross functional tests for inplace_update 2015-02-03 12:19:56 -08:00
memtablerep_bench.cc Fix clang build 2015-01-13 12:27:28 -08:00
merge_context.h Enhance partial merge to support multiple arguments 2014-03-24 17:57:13 -07:00
merge_helper.cc Turn -Wshadow back on 2014-11-06 11:14:28 -08:00
merge_helper.h Fixed the crash when merge_operator is not properly set after reopen. 2014-07-30 17:24:36 -07:00
merge_operator.cc Some small cleaning up to make some compiling environment happy 2014-03-26 18:11:41 -07:00
merge_test.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
perf_context_test.cc Perf Context to report DB mutex waiting time 2015-02-09 17:55:12 -08:00
plain_table_db_test.cc Add rocksdb::ToString() to address cases where std::to_string is not available. 2014-11-24 20:44:49 -08:00
prefix_test.cc Add rocksdb::ToString() to address cases where std::to_string is not available. 2014-11-24 20:44:49 -08:00
repair.cc Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
skiplist_test.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
skiplist.h Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
snapshot.h Expose Snapshot's SequenceNumber 2015-01-29 18:22:43 -08:00
table_cache.cc TableMock + framework for mock classes 2014-10-28 17:52:32 -07:00
table_cache.h use GetContext to replace callback function pointer 2014-09-29 11:09:09 -07:00
table_properties_collector_test.cc Switch logv with loglevel to virtual 2015-02-09 20:59:29 +01:00
table_properties_collector.cc Add rocksdb::ToString() to address cases where std::to_string is not available. 2014-11-24 20:44:49 -08:00
table_properties_collector.h TablePropertiesCollectorFactory 2014-05-13 12:30:55 -07:00
transaction_log_impl.cc Turn -Wshadow back on 2014-11-06 11:14:28 -08:00
transaction_log_impl.h Turn -Wshadow back on 2014-11-06 11:14:28 -08:00
version_builder_test.cc Fix data race #3 2015-02-04 16:04:51 -08:00
version_builder.cc Fix deleting obsolete files 2015-02-06 08:44:30 -08:00
version_builder.h Move VersionBuilder logic to a separate .cc file 2014-10-31 16:34:38 -07:00
version_edit_test.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
version_edit.cc Turn on -Wshadow 2014-10-31 11:59:54 -07:00
version_edit.h Fix deleting obsolete files 2015-02-06 08:44:30 -08:00
version_set_test.cc rename FileLevel to LevelFilesBrief / unfriend CompactedDBImpl 2014-10-28 10:03:13 -07:00
version_set.cc build: remove always-true assertions 2015-02-20 11:07:03 -08:00
version_set.h Add rocksdb.num-live-versions: number of live versions 2015-02-19 13:10:37 -08:00
wal_manager_test.cc Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
wal_manager.cc Fix archive WAL race conditions 2015-01-23 17:35:12 -08:00
wal_manager.h Fix -Wnon-virtual-dtor errors 2014-11-10 17:39:38 -05:00
write_batch_internal.h remove all remaining references to cfd->options() 2014-11-18 10:20:10 -08:00
write_batch_test.cc Remove the use of exception in WriteBatch::Handler 2014-12-04 12:01:55 -08:00
write_batch.cc Simplify column family concurrency 2015-01-06 12:44:21 -08:00
write_controller_test.cc Push- instead of pull-model for managing Write stalls 2014-09-08 11:20:25 -07:00
write_controller.cc Push- instead of pull-model for managing Write stalls 2014-09-08 11:20:25 -07:00
write_controller.h Fix #284 2014-09-13 14:14:10 -07:00
write_thread.cc WriteThread 2014-09-12 16:23:58 -07:00
write_thread.h Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
writebuffer.h Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00