commit 63bd65dba92f827513323883fdc33b1e11d0071a
author Lokesh Gidra <lokeshgidra@google.com> Sat Dec 03 00:24:52 2022 +0000
committer Lokesh Gidra <lokeshgidra@google.com> Wed Dec 07 23:17:40 2022 +0000
tree a517c43ae141d685168a62beef15dfd8b3a61e8a
parent d0a9b5463e12106f55fbd74c5f5201573e031ec8

Avoid using SafeCopy on userfaultfd compacted spaces

Userfaultfd doesn't allow faults generating from kernel-space for
unprivileged processes. Therefore, avoid using SafeCopy to fetch
class in fault-handler.

Also add a run-test to cause null-pointer exceptions which exercises
fault-handler.

Bug: 160737021
Test: ART_USE_READ_BARRIER=false art/test/testrunner/testrunner.py -t 2045-uffd-kernelfault
Change-Id: If54bb01d441fab5489289e0ec195896700fac662
(cherry picked from commit f716e21fb87e4fd1c875997cf11882352b9fbab5)
Merged-In: If54bb01d441fab5489289e0ec195896700fac662