tree ef41a1e8955acd12d92d1635b5e35ff9914efb3d
parent 808b52ac76bb5d9ee3e6a8371ddab25f62c8ed51
author Tom Sepez <tsepez@chromium.org> 1504891117 -0700
committer Chromium commit bot <commit-bot@chromium.org> 1504892230 +0000

Fix one-second spin in fx_random.cpp

Take seed generation logic from base's address_space_randomization.cc.
One small tweak is to avoid the bottom three bits of a stack address and
invert, to make leaking ASLR more difficult along the lines of the
freelist masking in base's partition allocator. Another tweak is to
mix in some more time-based information. Another tweak is to add in
the times called so that rapid successive calls return different results.

Bug: pdfium:891
Change-Id: I14238da15cee9c8d4ca72d79e4f7fbb26997c619
Reviewed-on: https://pdfium-review.googlesource.com/13490
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>