The memory pressure handler currently calls GCController::deleteAllCode(DeleteAllCodeIfNotCollecting), but it turns out we hit the case of a collection being in progress moderately often. We already do a bunch of blocky work here to get memory usage down, so let's change this to PreventCollectionAndDeleteAllCode to guarantee we can drop all JIT code.
<rdar://problem/106065668>
Pull request: https://github.com/WebKit/WebKit/pull/10847
Committed 261061@main (69098ebe6b1e): <https://commits.webkit.org/261061@main> Reviewed commits have been landed. Closing PR #10847 and removing active labels.