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I have added a proposal in glibc to implement a new fortification level _FORTIFY_SOURCE=3 which enables potentially more expensive hardening, as is done by
__builtin_dynamic_object_size
. This patch adds support in tests for allocating the buffer dynamically and then testing_FORTIFY_SOURCE=3
with them.The current state is that with upstream clang and gcc, all of the tests fail with
_FORTIFY_SOURCE=3
. With the glibc changes to add_FORTIFY_SOURCE=3
(I'll post the final patches soon), clang passes all tests because it has__builtin_dynamic_object_size
.This change is actually just one commit, the other three commits belong to the other two PRs.