Volatilize the global store in DummyExport to defeat Clang's optimizer and avoid ICF

Volatilize the global store in DummyExport to defeat Clang's optimizer and avoid ICF

Otherwise this test crashes under ASan while running a corrupted at-exit handler.

R=grt@chromium.org,thakis@chromium.org
BUG=636157
Committed: https://crrev.com/98b87cf47c62669a1bcd67f0db868c31482605a1
Cr-Commit-Position: refs/heads/master@{#411134}

[Nico, 2016-08-10 01:36:16]

lgtm

[Nico, 2016-08-10 01:36:39]

On 2016/08/10 01:36:16, Nico (away until Mon Aug 22) wrote:
> lgtm

grt: see bug for details

[Reid Kleckner, 2016-08-10 14:29:21]

The CQ bit was checked by rnk@chromium.org

[commit-bot: I haz the power, 2016-08-10 14:29:42]

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

[grt (UTC plus 2), 2016-08-10 14:39:10]

lgtm

[commit-bot: I haz the power, 2016-08-10 15:12:29]

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

[commit-bot: I haz the power, 2016-08-10 15:12:30]

Try jobs failed on following builders:
  ios-device on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device/builds...)

[Reid Kleckner, 2016-08-10 20:20:10]

The CQ bit was checked by rnk@chromium.org

[commit-bot: I haz the power, 2016-08-10 20:20:47]

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, 2016-08-10 20:25:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-10 20:28:39]

Description was changed from

==========
Volatilize the global store in DummyExport to defeat Clang's optimizer and avoid
ICF

Otherwise this test crashes under ASan while running a corrupted at-exit
handler.

R=grt@chromium.org,thakis@chromium.org
BUG=636157
==========

to

==========
Volatilize the global store in DummyExport to defeat Clang's optimizer and avoid
ICF

Otherwise this test crashes under ASan while running a corrupted at-exit
handler.

R=grt@chromium.org,thakis@chromium.org
BUG=636157

Committed: https://crrev.com/98b87cf47c62669a1bcd67f0db868c31482605a1
Cr-Commit-Position: refs/heads/master@{#411134}
==========

[commit-bot: I haz the power, 2016-08-10 20:28:40]

Patchset 1 (id:??) landed as
https://crrev.com/98b87cf47c62669a1bcd67f0db868c31482605a1
Cr-Commit-Position: refs/heads/master@{#411134}