[Valgrind-users] How to mark separate bits as undefined?

[juris <ju...@mt...>]

Hello, I was wondering if it is possible to partially mark
a memory location as undefined when running under valgrind.

I am using a custom allocator, that allocates a some bits
in a bitmap for each memory allocation. I would like to catch
access to these bits before they are initialized. Is there some
way to do it?

Thank you for the help.