diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/storage/ipc/ipc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/backend/storage/ipc/ipc.c b/src/backend/storage/ipc/ipc.c index bdbc2c3ac4b..11c3f132a10 100644 --- a/src/backend/storage/ipc/ipc.c +++ b/src/backend/storage/ipc/ipc.c @@ -381,9 +381,9 @@ on_shmem_exit(pg_on_exit_callback function, Datum arg) * cancel_before_shmem_exit * * this function removes a previously-registered before_shmem_exit - * callback. For simplicity, only the latest entry can be - * removed. (We could work harder but there is no need for - * current uses.) + * callback. We only look at the latest entry for removal, as we + * expect callers to add and remove temporary before_shmem_exit + * callbacks in strict LIFO order. * ---------------------------------------------------------------- */ void @@ -394,6 +394,9 @@ cancel_before_shmem_exit(pg_on_exit_callback function, Datum arg) == function && before_shmem_exit_list[before_shmem_exit_index - 1].arg == arg) --before_shmem_exit_index; + else + elog(ERROR, "before_shmem_exit callback (%p,0x%llx) is not the latest entry", + function, (long long) arg); } /* ---------------------------------------------------------------- |