Revert "Re-enable ART's region space memory protection on host."
This reverts commit 693f21c7fb412c30afbc292ef47e4cd884f54e56.
Reason for revert: Spurious SEGV_ACCERRs still happening on some hosts.
Bug: 63131961
Bug: 74064045
Bug: 116841931
Change-Id: I063a891ecf847e327d27b5ae685f1550f892c94e
diff --git a/runtime/gc/space/region_space.cc b/runtime/gc/space/region_space.cc
index 6d494fa..9c6a73c 100644
--- a/runtime/gc/space/region_space.cc
+++ b/runtime/gc/space/region_space.cc
@@ -31,7 +31,8 @@
static constexpr uint kEvacuateLivePercentThreshold = 75U;
// Whether we protect the unused and cleared regions.
-static constexpr bool kProtectClearedRegions = true;
+// Only protect for target builds to prevent flaky test failures (b/63131961).
+static constexpr bool kProtectClearedRegions = kIsTargetBuild;
// Wether we poison memory areas occupied by dead objects in unevacuated regions.
static constexpr bool kPoisonDeadObjectsInUnevacuatedRegions = true;
