> So what exactly did you have in mind when you were proposing that > check? Did you mean to do a pass over all VMAs within the process to > check if there is at least one executable VMA belonging to > address_space? If yes, then that would certainly be way too expensive > to be usable. I was thinking to only report the build ID when the VMA queried is executable. If software wanted to look up a data symbol and needs that buildid it would need to check a x vma too. Normally tools iterate over all the mappings anyways so this shouldn't be a big burden for them. Did I miss something? I guess an alternative would be a new VMA flag, but iirc we're low on bits there already. -Andi
