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rsesek@ wrote:
Anything forked from the system zygote will have many libraries with the
same address space layout, with plenty of gadgets for exploitation.
There’s no benefit to doing extra work to support different layout just
for Chrome’s relocations.

Hence switch the crazylinker to share RELROs across renderer/utility and
browser processes. This should save ~2 MiB RAM (private dirty) on
non-lowend devices.  The low-end devices are sharing RELROs since long
ago, so this change just removes code for not-sharing RELROs.

Bug: 981599
Change-Id: I96225be9c3dad3df0c0e3d90f66fec3db364750d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1694101
Commit-Queue: Egor Pasko <pasko@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Benoit L <lizeb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676394}