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AuroraMiddleware/v8

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Author	SHA1	Message	Date
rossberg@chromium.org	76375de29d	Object.observe: prevent observed objects from using fast elements. This is necessary because polymorphic stores generally do not perform a map check but only an instance type check, which misses out on changes in the observation status. Unfortunately, there currently is no efficient way in V8 to maintain that optimisation in the presence of Object.observe. R=mstarzinger@chromium.org BUG=v8:2409 Review URL: https://codereview.chromium.org/11477006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13205 ce2b1a6d-e550-0410-aec6-3dcde31c8c00	2012-12-12 11:38:24 +00:00
verwaest@chromium.org	09b1574baa	Make ElementsAccessors more tolerant of varying backing store types This avoids bogus calls to Fixed*Array::cast() when FastElements-backed objects are empty (and thus backed by empty_fixed_array). Review URL: https://chromiumcodereview.appspot.com/11299190 Patch from Adam Klein <adamk@chromium.org>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00	2012-11-28 08:41:45 +00:00

Author

SHA1

Message

Date

rossberg@chromium.org

76375de29d

Object.observe: prevent observed objects from using fast elements.

This is necessary because polymorphic stores generally
do not perform a map check but only an instance type check,
which misses out on changes in the observation status.
Unfortunately, there currently is no efficient way in V8
to maintain that optimisation in the presence of Object.observe.

R=mstarzinger@chromium.org
BUG=v8:2409

Review URL: https://codereview.chromium.org/11477006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13205 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

2012-12-12 11:38:24 +00:00

verwaest@chromium.org

09b1574baa

Make ElementsAccessors more tolerant of varying backing store types

This avoids bogus calls to Fixed*Array::cast() when FastElements-backed objects are empty (and thus backed by empty_fixed_array).

Review URL: https://chromiumcodereview.appspot.com/11299190
Patch from Adam Klein <adamk@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

2012-11-28 08:41:45 +00:00

2 Commits