Relax verification of JSFunction result caches.

Relax verification of JSFunction result caches.

As invocation of a functin may trigger GC and hence clear all the caches,
it's hard to ensure previous invariants.

Current invariant is both a key and a value should be the holes or not holes.

Committed: http://code.google.com/p/v8/source/detail?r=6338

[antonm, 2011-01-14 18:02:24]

Vitaly,

may you have a look?

[Vitaly Repeshko, 2011-01-14 21:22:27]

Can we avoid breaking the (old nice) invariant by setting the cache size only
after calling the factory function? (The generated code in the classic backend
seems to do exactly this so it seems like the only place to fix is
Runtime_GetFromCache.) Otherwise, LGTM.

http://codereview.chromium.org/6309004/diff/1/src/objects-debug.cc
File src/objects-debug.cc (right):

http://codereview.chromium.org/6309004/diff/1/src/objects-debug.cc#newcode666
src/objects-debug.cc:666: int size = Smi::cast(get(kCacheSizeIndex))->value();
Probably needs USE(size) now.