[Tarantool-patches] [PATCH v7 2/5] box/applier: add missing diag_set on region_alloc failure
Sergey Ostanevich
sergos at tarantool.org
Mon Feb 3 17:39:28 MSK 2020
Hi!
Thanks for the patch!
LGTM.
Sergos
On 28 Jan 22:22, Cyrill Gorcunov wrote:
> In case if we're hitting memory limit allocating triggers
> we should setup diag error to prevent nil dereference
> in diag_raise call (for example from applier_apply_tx).
>
> Note that there are region_alloc_xc helpers which are
> throwing errors but as far as I understand we need the
> rollback action to process first instead of immediate
> throw/catch thus we use diag_set.
>
> Signed-off-by: Cyrill Gorcunov <gorcunov at gmail.com>
> ---
> src/box/applier.cc | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/src/box/applier.cc b/src/box/applier.cc
> index ae3d281a5..2ed5125d0 100644
> --- a/src/box/applier.cc
> +++ b/src/box/applier.cc
> @@ -796,8 +796,11 @@ applier_apply_tx(struct stailq *rows)
> sizeof(struct trigger));
> on_commit = (struct trigger *)region_alloc(&txn->region,
> sizeof(struct trigger));
> - if (on_rollback == NULL || on_commit == NULL)
> + if (on_rollback == NULL || on_commit == NULL) {
> + diag_set(OutOfMemory, sizeof(struct trigger),
> + "region_alloc", "on_rollback/on_commit");
> goto rollback;
> + }
>
> trigger_create(on_rollback, applier_txn_rollback_cb, NULL, NULL);
> txn_on_rollback(txn, on_rollback);
> --
> 2.20.1
>
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