(Variant 2: use stack for buffers)
my_malloc_size_cb_func() has a call to thd->alloc() to produce an error message.
thd->alloc() calls alloc_root(), so one can end up with this stack trace:
alloc_root()
THD::alloc()
my_malloc_size_cb_func()
my_malloc()
alloc_root()
where alloc_root() calls itself. This is a problem, as alloc_root() is not
reenterable.
Fixed this by switching my_malloc_size_cb_func() to use space on the stack
instead.
This patch adds for "--ps-protocol" second execution
of queries "SELECT".
Also in this patch it is added ability to disable/enable
(--disable_ps2_protocol/--enable_ps2_protocol) second
execution for "--ps-prototocol" in testcases.
