148440 2015-08-25 12:02:28 -0700 DFG::AbstractHeap should be able to distinguish between heap locations that are user-observable and heap locations that are VM-internal 2015-08-25 12:02:28 -0700 1 1 1 Unclassified WebKit JavaScriptCore Other All All NEW P2 Normal --- 1 fpizlo webkit-unassigned oldest_to_newest 1120674 0 fpizlo 2015-08-25 12:02:28 -0700 If you write to a VM-internal heap, it shouldn't clobber exit, because the user won't know that you had done it. Note that it's not as simple as that. Depending on how you define "VM-internal", a VM-internal write might still put the system in a state where OSR exit is invalid even though the write was not user-observable. So, it's not entirely obvious that this is a good idea, but it's worth thinking about.