cfbc1eed9c
Finally sovles the problem that r5342 attempted to solve. When adding a stub to a map's code cache we need to make sure that this map is not used by object that do not need this stub. Existing solution had 2 flaws: 1. It checked that the map is cached by asking the current context. If the object escaped into another context then NormalizedMapCache::Contains returns false negative. 2. If a map gets evicted from the cache we should not try to modify it even though Contains returns false. This patch implements much less fragile solution of the same problem: A map now has a flag (is_shared) that is set once the map is added to a cache, stays set even after the cache eviction, and is cleared if the object goes back to fast mode. Added a regression test. Review URL: http://codereview.chromium.org/3472006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5518 ce2b1a6d-e550-0410-aec6-3dcde31c8c00 |
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