'attribute cost to callers' feature for bottom-up view

[milianw]

it would be nice to get the ability to attribute the self cost of a given function, or even a whole library, to its callers. Basically this would hide the symbol(s) from the bottom-up view and instead add their self cost to the parent frame

[GitMensch]

This would be indeed very useful - but also the other way around (which is likely "similar", so I wasn't sure if I should move this out to an own issue):

The option to click on a symbol and say "attribute all callees to this function", cleaning up a lot of entries in the bottom-up view. This would especially clean up calls into libraries (like central DB functions) in a way that they are still visible but only as a big "block", not as "more memcpy, sprintf, ...".