Tell MSan to ignore uninitialized padding when writing snapshots

Tell MSan to ignore uninitialized padding when writing snapshots

After r299061, MSan started complaining about uninitialized data in
fwrite.

BUG=chromium:710152
Review-Url: https://codereview.chromium.org/2808253002
Cr-Commit-Position: refs/heads/master@{#44587}
Committed: https://chromium.googlesource.com/v8/v8/+/dd1e2e849939e1728910cf293bb2651c98a12dba

[hans, 2017-04-10 23:59:40]

hans@chromium.org changed reviewers:
+ vogelheim@chromium.org

[hans, 2017-04-10 23:59:41]

Please take a look.

[vogelheim1, 2017-04-11 08:58:29]

vogelheim@google.com changed reviewers:
+ vogelheim@google.com

[vogelheim1, 2017-04-11 08:58:30]

lgtm. Thanks for diagnosing and fixing this!

[hans, 2017-04-11 15:34:21]

The CQ bit was checked by hans@chromium.org

[commit-bot: I haz the power, 2017-04-11 15:34:31]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-11 15:34:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-11 15:34:33]

No L-G-T-M from a valid reviewer yet.
CQ run can only be started once the patch has received an L-G-T-M from a full
committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,_not_ a
full super star committer.
Committers are members of the group "project-v8-committers".
Note that this has nothing to do with OWNERS files.

[hans, 2017-04-11 15:36:10]

On 2017/04/11 15:34:33, commit-bot: I haz the power wrote:
> No L-G-T-M from a valid reviewer yet.
> CQ run can only be started once the patch has received an L-G-T-M from a full
> committer.
> Even if an L-G-T-M may have been provided, it was from a non-committer,_not_ a
> full super star committer.
> Committers are members of the group "project-v8-committers".
> Note that this has nothing to do with OWNERS files.

vogelheim: Aren't you an owner here? Did you lgtm with the wrong account?

[vogelheim, 2017-04-11 15:38:18]

vogelheim@chromium.org changed reviewers:
- vogelheim@google.com

[vogelheim, 2017-04-11 15:38:18]

lgtm

(Yes, I used the wrong account. Sorry.)

[hans, 2017-04-11 15:43:40]

The CQ bit was checked by hans@chromium.org

[commit-bot: I haz the power, 2017-04-11 15:43:50]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-11 17:01:59]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491925420283000, "parent_rev":
"76f0a91c9263aba7b073a31d63d40ea1cc9f49af", "commit_rev":
"dd1e2e849939e1728910cf293bb2651c98a12dba"}

[commit-bot: I haz the power, 2017-04-11 17:02:05]

Description was changed from

==========
Tell MSan to ignore uninitialized padding when writing snapshots

After r299061, MSan started complaining about uninitialized data in
fwrite.

BUG=chromium:710152
==========

to

==========
Tell MSan to ignore uninitialized padding when writing snapshots

After r299061, MSan started complaining about uninitialized data in
fwrite.

BUG=chromium:710152

Review-Url: https://codereview.chromium.org/2808253002
Cr-Commit-Position: refs/heads/master@{#44587}
Committed:
https://chromium.googlesource.com/v8/v8/+/dd1e2e849939e1728910cf293bb2651c98a...
==========

[commit-bot: I haz the power, 2017-04-11 17:02:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/dd1e2e849939e1728910cf293bb2651c98a...