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mdbx: more robustness for thread checking while reset/renew/abort of txn.

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This commit is contained in:
Leo Yuriev 2017-10-27 18:01:20 +03:00
parent d4bf0a3332
commit d1f04656ab
1 changed files with 13 additions and 6 deletions
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19
src/mdbx.c
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@ -2633,6 +2633,7 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
if (rc != MDBX_SUCCESS)
goto bailout;
}
txn->mt_owner = mdbx_thread_self();
return MDBX_SUCCESS;
}
bailout:
@ -2650,14 +2651,15 @@ int mdbx_txn_renew(MDBX_txn *txn) {
if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
return MDBX_EBADSIGN;
if (unlikely(txn->mt_owner != mdbx_thread_self()))
return MDBX_THREAD_MISMATCH;
if (unlikely(!F_ISSET(txn->mt_flags, MDBX_TXN_RDONLY | MDBX_TXN_FINISHED)))
return MDBX_EINVAL;
if (unlikely(txn->mt_owner != 0))
return MDBX_THREAD_MISMATCH;
rc = mdbx_txn_renew0(txn, MDBX_TXN_RDONLY);
if (rc == MDBX_SUCCESS) {
txn->mt_owner = mdbx_thread_self();
mdbx_debug("renew txn %" PRIaTXN "%c %p on env %p, root page %" PRIaPGNO
"/%" PRIaPGNO,
txn->mt_txnid, (txn->mt_flags & MDBX_TXN_RDONLY) ? 'r' : 'w',
@ -2780,7 +2782,6 @@ int mdbx_txn_begin(MDBX_env *env, MDBX_txn *parent, unsigned flags,
if (txn != env->me_txn0)
free(txn);
} else {
txn->mt_owner = mdbx_thread_self();
txn->mt_signature = MDBX_MT_SIGNATURE;
*ret = txn;
mdbx_debug("begin txn %" PRIaTXN "%c %p on env %p, root page %" PRIaPGNO
@ -2940,7 +2941,12 @@ int mdbx_txn_reset(MDBX_txn *txn) {
return MDBX_EINVAL;
/* LY: don't close DBI-handles in MDBX mode */
return mdbx_txn_end(txn, MDBX_END_RESET | MDBX_END_UPDATE);
int rc = mdbx_txn_end(txn, MDBX_END_RESET | MDBX_END_UPDATE);
if (rc == MDBX_SUCCESS) {
assert(txn->mt_signature == MDBX_MT_SIGNATURE);
assert(txn->mt_owner == 0);
}
return rc;
}
int mdbx_txn_abort(MDBX_txn *txn) {
@ -2950,7 +2956,8 @@ int mdbx_txn_abort(MDBX_txn *txn) {
if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
return MDBX_EBADSIGN;
if (unlikely(txn->mt_owner != mdbx_thread_self()))
if (unlikely(txn->mt_owner !=
((txn->mt_flags & MDBX_TXN_FINISHED) ? 0 : mdbx_thread_self())))
return MDBX_THREAD_MISMATCH;
if (F_ISSET(txn->mt_flags, MDBX_TXN_RDONLY))