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mdbx: minor fix meta_checktxnid() to avoid assertion in debug mode.

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This commit is contained in:
Леонид Юрьев (Leonid Yuriev)
2022-06-29 13:35:07 +03:00
parent 23bbceb367
commit 48c6051482
1 changed files with 6 additions and 6 deletions
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12
src/core.c
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@@ -7803,7 +7803,7 @@ __cold int mdbx_thread_unregister(const MDBX_env *env) {
/* check against todo4recovery://erased_by_github/libmdbx/issues/269 */
static bool meta_checktxnid(const MDBX_env *env, const MDBX_meta *meta,
bool report) {
const txnid_t meta_txnid = constmeta_txnid(env, meta);
const txnid_t head_txnid = meta_txnid(env, meta);
const txnid_t freedb_mod_txnid = meta->mm_dbs[FREE_DBI].md_mod_txnid;
const txnid_t maindb_mod_txnid = meta->mm_dbs[MAIN_DBI].md_mod_txnid;
@@ -7820,25 +7820,25 @@ static bool meta_checktxnid(const MDBX_env *env, const MDBX_meta *meta,
const uint64_t magic_and_version =
unaligned_peek_u64(4, &meta->mm_magic_and_version);
bool ok = true;
if (unlikely(meta_txnid < freedb_mod_txnid ||
if (unlikely(!head_txnid || head_txnid < freedb_mod_txnid ||
(!freedb_mod_txnid && freedb_root &&
likely(magic_and_version == MDBX_DATA_MAGIC)))) {
if (report)
mdbx_warning(
"catch invalid %sdb_mod_txnid %" PRIaTXN " for meta_txnid %" PRIaTXN
" %s",
"free", freedb_mod_txnid, meta_txnid,
"free", freedb_mod_txnid, head_txnid,
"(workaround for incoherent flaw of unified page/buffer cache)");
ok = false;
}
if (unlikely(meta_txnid < maindb_mod_txnid ||
if (unlikely(head_txnid < maindb_mod_txnid ||
(!maindb_mod_txnid && maindb_root &&
likely(magic_and_version == MDBX_DATA_MAGIC)))) {
if (report)
mdbx_warning(
"catch invalid %sdb_mod_txnid %" PRIaTXN " for meta_txnid %" PRIaTXN
" %s",
"main", maindb_mod_txnid, meta_txnid,
"main", maindb_mod_txnid, head_txnid,
"(workaround for incoherent flaw of unified page/buffer cache)");
ok = false;
}
@@ -7879,7 +7879,7 @@ static bool meta_checktxnid(const MDBX_env *env, const MDBX_meta *meta,
* for todo4recovery://erased_by_github/libmdbx/issues/269 */
static int meta_waittxnid(const MDBX_env *env, const MDBX_meta *meta,
uint64_t *timestamp) {
if (likely(meta_checktxnid(env, (const MDBX_meta *)meta, !*timestamp)))
if (likely(meta_checktxnid(env, meta, !*timestamp)))
return MDBX_SUCCESS;
if (!*timestamp)