Import wiredtiger: 45b751a54fb181d1995684f7c807bbbc142d3c90 from branch mongodb-3.6

ref: 0d4bc746f2..45b751a54f
for: 3.6.9

WT-3276       Add recover=salvage to recover from a corrupted log file
WT-3735       Add a workgen workload that generates a lot of page splits
WT-3736       Add statistics to measure contention on lookaside cursor
WT-3839       Document the undefined behavior when a range truncate overlaps with inserts
WT-3856       Create a test that runs recovery to different points of time with schema operations
WT-3879       Disallow checkpoint from evicting metadata pages
WT-3894       Timestamp queue implementation and statistics improvements
WT-3917       Enhance WT_CURSOR::reserve documentation around commit visibility
WT-3943       Include full error message when a python test asserts
WT-3955       Add verbose option to log more messages on error returns
WT-3963       Add a schema intensive abort testing
WT-3968       Use compression ratio to tune page sizes
WT-4010       Simplify test/format timestamp handling.
WT-4024       Fix a race between split and next/prev
WT-4026       Add implementation for existing file extension configuration API
WT-4048       Generalize timing_stress_for_test split functionality
WT-4067       Enhance LSM to not pin as much history in cache
WT-4090       Low priority reads
WT-4101       Don't abort the eviction server during session verify when oldest_timestamp is held back
WT-4104       Fix test/format failure during comparing data content with berkeley db
WT-4111       Improve checkpoint scrubbing algorithm
WT-4119       Avoid restarts updating / removing during a column store scan
WT-4125       Ensure that subsequent checkpoints with stable timestamp don't read too much
WT-4131       Rename lookaside to cache overflow
WT-4133       Coverity 1393445, 1393446 Dereference before null check
WT-4134       Rework assertion that we don't discard required history
WT-4136       Add a new timing stress flag that yields during tree search
WT-4138       Add an option to timeout waiting for space in the cache
WT-4139       rename the cursor restart statistic to match implementation
WT-4140       Cursor walk limits quick eviction page selection unnecessarily.
WT-4141       Enhance checkpoint with timestamps to unblock eviction sooner
WT-4143       Use WiredTiger.turtle.set if it exists but WiredTiger.turtle does not
WT-4144       Fix rollback_to_stable with lookaside history
WT-4145       Only include the checkpoint timestamp during checkpoints
WT-4146       Coverity 1393639, unused variable
WT-4147       Log recovery should not ignore corruption outside of log records in a log file
WT-4152       Save return value for later comparison in transaction code
WT-4154       Surface the oldest read timestamp
WT-4156       Add new wiredtiger_salvage top level API
WT-4160       Restore performance when timestamps are not in use
WT-4163       Lint
WT-4168       Update upgrading documentation for 3.1.0 release
WT-4169       Fix wt verify dump-pages failure
WT-4171       Enabling tree walk timing stress causes excessive slowdown
WT-4172       Add diagnostic hazard pointer checks in more places before freeing refs
WT-4174       Do not access the lookaside file in rollback_to_stable when running with in_memory=true
WT-4176       Expose a WT_SESSION.query_timestamp method
WT-4177       Backup cursor open should force a log file switch
WT-4178       Fixes for wt_btree_immediately_durable needed for in-memory
WT-4179       Expose WiredTiger crc32c functions
WT-4182       Use conservative approach for log checksum errors
WT-4183       Extend verbose option to log more messages on error returns
WT-4185       Don't remove all lookaside entries when reading a page
WT-4186       Log recovery should detect and report corruption within log records
WT-4187       Coverity: unused value complaints
WT-4188       Coverity: unchecked return value complaints
WT-4189       Potential infinite loop in __async_flush_wait().
WT-4191       Fix Coverity static analysis errors
WT-4193       test/format snapshot-isolation search mismatch
WT-4194       Improve fairness of eviction with multiple tables
WT-4195       When encountering an illegal value, log the value that failed
WT-4196       Make log corruption checking work regardless of the machine byte order
WT-4198       Some supported MongoDB architectures don't support crc32 hardware
WT-4199       Fix an incorrect report of log corruption
WT-4201       Fix Coverity static analysis issues
WT-4206       Fix error handling in cursor close routines
WT-4207       Coverity #1394567: null pointer dereference
WT-4208       tree walks can be interrupted by locked internal pages
WT-4210       schema abort child process failing prematurely
WT-4211       Add automated test for long running prepared transactions
WT-4212       Update lookaside schema to handle prepared transactions
WT-4213       Rename lock statistics that have redundant or misleading text
WT-4215       Allow recovery of backup without salvage
WT-4216       Use separate counters for page_swap yield and sleep
WT-4218       Change eviction to evict prepared updates
WT-4225       Automate a backup test that simulates volume snapshot via dd
WT-4226       test/format  LSM configurations can misconfigure prepare and timestamps
WT-4229       Lint
WT-4231       Fix ctags index of functions with attributes
WT-4233       Change log corruption errors to warnings and truncate log
WT-4234       Remove documentation mention of legacy tool statlog.py
WT-4235       Fix workgen tracking of table state across workloads
WT-4239       Don't allow checkpoints to perform insert-splits in the tree
WT-4241       GNU-stack section should never be conditionally compiled out
WT-4242       New log file extension Python test failure
WT-4246       Change transaction update list to support indirect references
WT-4248       Fix checkpoints in schema_abort for slow machines
WT-4249       Attempt to discard dirty page during verify operation
WT-4251       Prepared updates cannot be discarded
WT-4252       Btree debug functions can leak scratch buffers on error.
WT-4253       Btree debug function to do blind reads doesn't handle row-store internal pages
WT-4256       Loosen check during rollback_to_stable
WT-4257       Don't assume timestamps from lookaside are aligned in memory
WT-4259       Restore ref to the previous state rather than MEM when eviction fails
WT-4261       Test salvage of out-of-sync metadata/turtle files
WT-4262       Lock deleted children in eviction of internal pages
WT-4263       Use the right tree when copying a key for a lookaside write
WT-4264       Compaction can race with page modifications
WT-4267       fixed-length column store operations can corrupt data
WT-4268       Random abort should wait until record files exist before starting timer
WT-4270       Add an operation field to know where threads hang
WT-4272       Increase startup timeout to 30 seconds for slow I/O systems
WT-4274       Fix memory leak in wt4156_metadata_salvage test
WT-4277       Make truncate in column stores more efficient
WT-4281       Shorten runtime of Python test suite
WT-4282       Don't transition pages from limbo to mem unless required
WT-4283       Restore WT_ERROR and use a corrupt flag
WT-4284       Print a verbose message in recovery on error too
WT-4285       Fix wt4156_metadata_salvage Coverity/lint complaints
WT-4286       Column store should skip end-of-table checks if there's an exact match
WT-4288       Don't let return value of closing conn overwrite WT_TRY_SALVAGE
WT-4289       Update WT_DATA_CORRUPTION to WT_TRY_SALVAGE in test_txn19.py
WT-4291       Fix test_txn19.py error detection by looking for WT_ERROR
WT-4292       Add call to testutil_cleanup to avoid memory leak
WT-4300       Setting the update timestamp can overwrite the WT_REF.addr field
WT-4301       WT_CURSOR.reserve operations can leak memory when committed
WT-4305       Add a gating variable for long running prepare support
WT-4306       Fix mode if metadata pages need eviction
WT-4308       Insert split during sync should not free blocks
WT-4321       Disable the random direct I/O test
WT-4325       Add a WiredTiger-local version of the qsort(3) call

1 files changed, 6 insertions, 0 deletions

diff --git a/src/third_party/wiredtiger/src/block/block_ext.c b/src/third_party/wiredtiger/src/block/block_ext.c
index 3995fdb4c94..a7b55985fa1 100644
--- a/src/third_party/wiredtiger/src/block/block_ext.c
+++ b/src/third_party/wiredtiger/src/block/block_ext.c
@@ -505,6 +505,9 @@ __wt_block_alloc(
 	WT_EXT *ext, **estack[WT_SKIP_MAXDEPTH];
 	WT_SIZE *szp, **sstack[WT_SKIP_MAXDEPTH];
 
+	/* If a sync is running, no other sessions can allocate blocks. */
+	WT_ASSERT(session, WT_SESSION_BTREE_SYNC_SAFE(session, S2BT(session)));
+
 	/* Assert we're maintaining the by-size skiplist. */
 	WT_ASSERT(session, block->live.avail.track_size != 0);
 
@@ -622,6 +625,9 @@ __wt_block_off_free(
 {
 	WT_DECL_RET;
 
+	/* If a sync is running, no other sessions can free blocks. */
+	WT_ASSERT(session, WT_SESSION_BTREE_SYNC_SAFE(session, S2BT(session)));
+
 	/*
 	 * Callers of this function are expected to have already acquired any
 	 * locks required to manipulate the extent lists.