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Michael Lippautz authored
TracedNode is used as backing node for v8::TracedGlobal (with destructor) and v8::TracedReference (no destructor). A future change adds concurrent marking for TracedReference which requires that the node stays around until the atomic pause to avoid synchronization with the concurrent marker. This change prepares TracedNode in prolonging the lifetime until the it is actively cleared ("sweeped") in the atomic pause. This allows for spuriously keeping alive a TracedNode for an additional GC cycle in the case the the node was destroyed while the marker is running. We maintain eager clearing of nodes where possible, i.e., outside of incremental marking. Bug: v8:12600 Change-Id: I9688c83a42b70d352c84613485f37242b1b910a6 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3436805Reviewed-by: Dominik Inführ <dinfuehr@chromium.org> Commit-Queue: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/main@{#78947}
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