OF 'STD::BAD_ALLOC'

DESCRIPTION:
============
Large number of rows in the performance_schema.data_locks
table results in std::bad_alloc exception being thrown and
terminating the program.

ANALYSIS:
========
Reading rows from the data_locks or data_lock_waits table
can return an unbounded number of rows during a scan,
depending on the application payload, as some user sessions
may have an unbounded number of records locked.
This can cause severe memory spike, which in turn can take
the server down if not handled properly.

FIX:
====
Exception handling has been added while reading
performance_schema.data_locks table and
performance_schema.data_lock_waits table such that it fails
with an error.

RB: 21314