Bugfix: type feedback vector should allocate *before* changing internal state.

Bugfix: type feedback vector should allocate *before* changing internal state.

An allocation can reenter type feedback code because of a triggered GC. Make
sure the vector state remains coherent at these points.

BUG=568524
LOG=N

Committed: https://crrev.com/45fc8f4c09937f173144cdeb0a32d41d1c6ef8d0
Cr-Commit-Position: refs/heads/master@{#32766}

[mvstanton, 2015-12-10 16:22:01]

mvstanton@chromium.org changed reviewers:
+ ishell@chromium.org

[mvstanton, 2015-12-10 16:22:01]

Hi Igor,
Here is the fix. I thought about introducing NoAllocation scopes during vector
manipulation, though maybe that's overkill. Thanks for the bug!
--Mike

[Igor Sheludko, 2015-12-10 17:23:48]

lgtm

[mvstanton, 2015-12-10 17:36:41]

The CQ bit was checked by mvstanton@chromium.org

[commit-bot: I haz the power, 2015-12-10 17:36:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1517613003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1517613003/1

[commit-bot: I haz the power, 2015-12-10 17:39:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-10 17:40:18]

Description was changed from

==========
Bugfix: type feedback vector should allocate *before* changing internal state.

An allocation can reenter type feedback code because of a triggered GC. Make
sure the vector state remains coherent at these points.

BUG=568524
LOG=N
==========

to

==========
Bugfix: type feedback vector should allocate *before* changing internal state.

An allocation can reenter type feedback code because of a triggered GC. Make
sure the vector state remains coherent at these points.

BUG=568524
LOG=N

Committed: https://crrev.com/45fc8f4c09937f173144cdeb0a32d41d1c6ef8d0
Cr-Commit-Position: refs/heads/master@{#32766}
==========

[commit-bot: I haz the power, 2015-12-10 17:40:19]

Patchset 1 (id:??) landed as
https://crrev.com/45fc8f4c09937f173144cdeb0a32d41d1c6ef8d0
Cr-Commit-Position: refs/heads/master@{#32766}