Bug 148440 – DFG::AbstractHeap should be able to distinguish between heap locations that are user-observable and heap locations that are VM-internal

• Status: NEW
• Component: JavaScriptCore

[Filip Pizlo]

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.