On Wed, May 8, 2019 at 8:38 AM Alexander Potapenko <glider@xxxxxxxxxx> wrote: > The new options are needed to prevent possible information leaks and > make control-flow bugs that depend on uninitialized values more > deterministic. I like having this available on both alloc and free. This makes it much more configurable for the end users who can adapt to their work loads, etc. > Linux build with -j12, init_on_free=1: +24.42% sys time (st.err 0.52%) > [...] > Linux build with -j12, init_on_alloc=1: +0.57% sys time (st.err 0.40%) Any idea why there is such a massive difference here? This seems to high just for cache-locality effects of touching all the freed pages. -- Kees Cook
