Import wiredtiger: da6c25fee0c5c9b0376df0dc19caa40a553cc5a2 from branch mongodb-4.4

ref: 5b5d798856..da6c25fee0
for: 4.5.1

WT-5527       Free the onpage updates when restoring update chains
WT-5675       Prepare support with durable history: workgen changes
WT-5778       Simplify __rec_append_orig_value
WT-5796       Speed up verification of file's associated history store information
WT-5811       Mark ASAN tests as running on a slow machine
WT-5909       Coverity unused value issue
WT-5930       (4.4-only) Journaled data from 4.2 binaries not recovered at startup
WT-5932       Rollback to stable aborting on-disk updates for in-memory database
WT-5938       Fix a memory corruption in rollback to stable
WT-5941       Document how eviction works in durable history
WT-5943       Consider WT_TS_NONE timestamped update also a valid update for rollback to stable
WT-5944       Relax test_wt2853_perf performance parameters temporarily
WT-5948       Search shouldn't ignore globally visible tombstone of history store
WT-5952       Fix freeing updates racing with application threads
WT-5953       Fix format CONFIG file "mmap_all" syntax incompatibility
WT-5961       Respect write generations when constructing the root addr
WT-5965       Ignore leading whitespace in format CONFIG files
WT-5967       Remove named snapshot support
WT-5978       Unstable prepared updates causing the update chain to be unnecessarily restored
WT-5979       Add Evergreen release compatibility test for forward compatibility
WT-5983       Remove diagnostic tests left over from WT-5043
WT-5985       Turn off format testing for relaxed isolation levels
WT-5987       Turn off history store verification in the WT_SESSION.verify method
WT-5988       Do not write log records as part recovery rollback to stable operation
WT-5993       Restore disk page header version
WT-5994       Turn off format testing for relaxed isolation levels (part 2)

1 files changed, 27 insertions, 0 deletions

diff --git a/src/third_party/wiredtiger/src/log/log.c b/src/third_party/wiredtiger/src/log/log.c
index b7b7ff66c58..963b1998289 100644
--- a/src/third_party/wiredtiger/src/log/log.c
+++ b/src/third_party/wiredtiger/src/log/log.c
@@ -1574,6 +1574,33 @@ err:
 }
 
 /*
+ * __wt_log_compat_verify --
+ *     Verify the last log when opening for the compatibility settings. This is separate because we
+ *     need to do it very early in the startup process.
+ */
+int
+__wt_log_compat_verify(WT_SESSION_IMPL *session)
+{
+    WT_DECL_RET;
+    uint32_t lastlog, lognum;
+    u_int i, logcount;
+    char **logfiles;
+
+    lastlog = 0;
+
+    WT_ERR(__log_get_files(session, WT_LOG_FILENAME, &logfiles, &logcount));
+    for (i = 0; i < logcount; i++) {
+        WT_ERR(__wt_log_extract_lognum(session, logfiles[i], &lognum));
+        lastlog = WT_MAX(lastlog, lognum);
+    }
+    if (lastlog != 0)
+        WT_ERR(__log_open_verify(session, lastlog, NULL, NULL, NULL, NULL));
+err:
+    WT_TRET(__wt_fs_directory_list_free(session, &logfiles, logcount));
+    return (ret);
+}
+
+/*
  * __wt_log_open --
  *     Open the appropriate log file for the connection. The purpose is to find the last log file
  *     that exists, open it and set our initial LSNs to the end of that file. If none exist, call