Make function lookup in classes thread-safe:

Make function lookup in classes thread-safe:
- Do not create/add function when looking them up  in TryCreatICData
- Do not allow background compilation to add/remove functions
- Cache function hash array as it may change or be set to null.

Check VMObject only if FLAG_verify_handles is true.

BUG=
R=asiva@google.com

Committed: https://github.com/dart-lang/sdk/commit/8e23dcced3a5f7521a08ef5eeecaaa3bef87c3f2

[srdjan, 2016-02-18 22:51:27]

srdjan@google.com changed reviewers:
+ asiva@google.com

[siva, 2016-02-18 23:56:50]

lgtm

https://codereview.chromium.org/1709273003/diff/20001/runtime/vm/object.cc
File runtime/vm/object.cc (right):

https://codereview.chromium.org/1709273003/diff/20001/runtime/vm/object.cc#ne...
runtime/vm/object.cc:3953: Array& hash_table = Array::Handle(thread->zone(),
const Array& hash_table =

[srdjan, 2016-02-19 00:01:25]

https://codereview.chromium.org/1709273003/diff/20001/runtime/vm/object.cc
File runtime/vm/object.cc (right):

https://codereview.chromium.org/1709273003/diff/20001/runtime/vm/object.cc#ne...
runtime/vm/object.cc:3953: Array& hash_table = Array::Handle(thread->zone(),
On 2016/02/18 23:56:50, siva wrote:
> const Array& hash_table = 

Done.

[srdjan, 2016-02-19 00:03:34]

Description was changed from

==========
Make function lookup in classes thread-safe:
- Do not create/add function when looking them up  in TryCreatICData
- Do not allow background compilation to add/remove functions
- Cache function hash array as it may change or be set to null.

Check VMObject only if FLAG_verify_handles is true.

BUG=
==========

to

==========
Make function lookup in classes thread-safe:
- Do not create/add function when looking them up  in TryCreatICData
- Do not allow background compilation to add/remove functions
- Cache function hash array as it may change or be set to null.

Check VMObject only if FLAG_verify_handles is true.

BUG=
R=asiva@google.com

Committed:
https://github.com/dart-lang/sdk/commit/8e23dcced3a5f7521a08ef5eeecaaa3bef87c3f2
==========

[srdjan, 2016-02-19 00:03:35]

Committed patchset #3 (id:40001) manually as
8e23dcced3a5f7521a08ef5eeecaaa3bef87c3f2 (presubmit successful).