Reviewers: Toon Verwaest, Michael Starzinger,
Message:
PTAL.
Description:
Make maps in monomorphic IC stubs weak.
Maps in monomorphic Load, KeyedLoad, Store, KeyedStore, and CompareNil IC
stubs are treated as weak references by the marking visitor.
During generation of an IC stub with a weak map, the stub is appended to the
dependent code array of the map. When the map dies, all stubs in its
dependent
code array are invalidated by setting embedded maps to undefined and
replacing
handlers with the miss builtin.
BUG=v8:2073
TEST=cctest/test-heap/WeakMapInMonomorphic*IC
Please review this at https://codereview.chromium.org/188783003/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files (+243, -13 lines):
M src/code-stubs.h
M src/code-stubs.cc
M src/flag-definitions.h
M src/ic.h
M src/ic.cc
M src/mark-compact.h
M src/mark-compact.cc
M src/objects.h
M src/objects-debug.cc
M src/objects-inl.h
M src/stub-cache.cc
M test/cctest/test-heap.cc
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