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mdbx: исправление затенения курсоров во вложенных транзакциях (backport).

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Леонид Юрьев (Leonid Yuriev) 2025-03-20 01:46:13 +03:00
parent 6c036add8b
commit c457804fad
2 changed files with 12 additions and 7 deletions
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6
src/api-cursor.c
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@ -690,11 +690,9 @@ MDBX_txn *mdbx_cursor_txn(const MDBX_cursor *mc) {
if (unlikely(!mc || mc->signature != cur_signature_live))
return nullptr;
MDBX_txn *txn = mc->txn;
if (unlikely(!txn || txn->signature != txn_signature))
if (unlikely(!txn || txn->signature != txn_signature || (txn->flags & MDBX_TXN_FINISHED)))
return nullptr;
if (unlikely(txn->flags & MDBX_TXN_FINISHED))
return nullptr;
return txn;
return (txn->flags & MDBX_TXN_HAS_CHILD) ? txn->env->txn : txn;
}
MDBX_dbi mdbx_cursor_dbi(const MDBX_cursor *mc) {

13
src/cursor.c
View File

@ -2347,14 +2347,21 @@ int cursor_check(const MDBX_cursor *mc, int txn_bad_bits) {
(char *)mc - stack_top < (ptrdiff_t)globals.sys_pagesize * 4));
if (txn_bad_bits) {
int rc = check_txn(mc->txn, txn_bad_bits);
int rc = check_txn(mc->txn, txn_bad_bits & ~MDBX_TXN_HAS_CHILD);
if (unlikely(rc != MDBX_SUCCESS)) {
cASSERT(mc, rc != MDBX_RESULT_TRUE);
return rc;
}
if (unlikely(cursor_dbi_changed(mc)))
return MDBX_BAD_DBI;
if (likely((mc->txn->flags & MDBX_TXN_HAS_CHILD) == 0))
return likely(!cursor_dbi_changed(mc)) ? MDBX_SUCCESS : MDBX_BAD_DBI;
cASSERT(mc, (mc->txn->flags & MDBX_TXN_RDONLY) == 0 && mc->txn != mc->txn->env->txn && mc->txn->env->txn);
rc = dbi_check(mc->txn->env->txn, cursor_dbi(mc));
if (unlikely(rc != MDBX_SUCCESS))
return rc;
cASSERT(mc, (mc->txn->flags & MDBX_TXN_RDONLY) == 0 && mc->txn == mc->txn->env->txn);
}
return MDBX_SUCCESS;