Add rudimentary support for ASan's intra-object-overflow detection.

Add rudimentary support for ASan's intra-object-overflow detection.

Also, add an ASan blacklist.

BUG=425374
R=glider@chromium.org

Committed: https://crrev.com/78507b971d25db9d18e3722a21de814280dc4ca6
Cr-Commit-Position: refs/heads/master@{#300882}

[earthdok, 2014-10-21 14:58:22]

ptal. this is Linux only.

[earthdok, 2014-10-21 15:57:43]

added a blacklist

[Alexander Potapenko, 2014-10-22 17:24:32]

LGTM

I think we may need to explicitly mention that the blacklist isn't to be used
for regular ASan builds. "Think twice" is fine for now.

[Alexander Potapenko, 2014-10-22 17:24:38]

The CQ bit was checked by glider@chromium.org

[commit-bot: I haz the power, 2014-10-22 17:26:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/640853007/20001

[earthdok, 2014-10-22 17:36:24]

On 2014/10/22 17:24:32, Alexander Potapenko wrote:
> LGTM
> 
> I think we may need to explicitly mention that the blacklist isn't to be used
> for regular ASan builds. "Think twice" is fine for now.

Who says it isn't?

If it isn't then we should've made it conditional on asan-field-padding.

[Alexander Potapenko, 2014-10-22 17:56:11]

On 2014/10/22 17:36:24, earthdok wrote:
> On 2014/10/22 17:24:32, Alexander Potapenko wrote:
> > LGTM
> > 
> > I think we may need to explicitly mention that the blacklist isn't to be
used
> > for regular ASan builds. "Think twice" is fine for now.
> 
> Who says it isn't?
I do :)

YMMV, but I think the best place for ASan annotations is next to the source,
otherwise they'll be hard to debug.
> If it isn't then we should've made it conditional on asan-field-padding.

[commit-bot: I haz the power, 2014-10-22 18:33:33]

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

[commit-bot: I haz the power, 2014-10-22 18:33:35]

Try jobs failed on following builders:
  linux_chromium_asan_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[earthdok, 2014-10-23 12:19:31]

The CQ bit was checked by earthdok@chromium.org

[commit-bot: I haz the power, 2014-10-23 12:20:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/640853007/20001

[commit-bot: I haz the power, 2014-10-23 14:00:22]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-23 14:00:52]

Patchset 2 (id:??) landed as
https://crrev.com/78507b971d25db9d18e3722a21de814280dc4ca6
Cr-Commit-Position: refs/heads/master@{#300882}