using valgrind on a loadable builtin

[Robert E. Griffith]

I am trying to to use valgrind memcheck on my loadable builtin which is 
getting a "corrupted size vs. prev_size" error but its output is 
suspiciously clean and when I use the -v (verbose) switch I do not see 
any msg about my builtin's .so being loaded even though I do see 
confirmation that the builtin gets loaded and ran in the output. So I 
suspect that it is not monitoring my .so.

I am running it like...

   valgrind -v  ../../bashParse/bash -c  'bg-dev tests run bg_objects.sh:'

The script enables my builtin.

bash and my builtin are being built with -g and no -O<n>

Anyone have any tips on getting meaningful output from valgrind for a 
loadable builtin?

BTW, in the debugger, I get the "corrupted size vs. prev_size\nAborted 
(coredumped)" error when I step into a call to "if 
(execute_shell_function(fDynCtor, dArgs) == 0) {...". I dont understand 
how a stepping into a function could be producing this error as opposed 
to a  malloc family function.

--BobG