Linux/CrOS: Use PR_SET_PTRACER for non-browser crashes.

Linux/CrOS: Use PR_SET_PTRACER for non-browser crashes.

BUG=46368, chromium-os:25195
TEST=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=118927

[Lei Zhang, 2012-01-23 23:05:53]

Hope you don't mind me squeezing in a little bit of code cleanup.

[Michael Krebs, 2012-01-23 23:24:40]

LGTM, although keescook@ should make sure it's correct.  I assume this will not
cause problems for those kernels not yet supporting the -1?  ...or for those not
supporting PR_SET_PTRACER at all, for that matter?

[Lei Zhang, 2012-01-23 23:29:03]

In a private email, keescook@ said: "Yes. On stock kernel it will return -1,
errno=ENOSYS. Without the -1 patch, a kernel with Yama will return -1,
errno=EINVAL."

I'll wait for his LG anyway.

[Kees Cook, 2012-01-24 00:46:41]

lgtm

LGTM too. Thanks!

[commit-bot: I haz the power, 2012-01-24 00:51:19]

No LGTM from any valid reviewer yet. Even if a LGTM may have been
provided, it was from a non-committer or a provisional committer
and not a full committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Lei Zhang, 2012-01-24 01:03:27]

+mseaborn or agl to stamp this.

[Mark Seaborn, 2012-01-24 05:28:28]

LGTM

[agl, 2012-01-24 12:17:23]

lgtm

LGTM

[commit-bot: I haz the power, 2012-01-24 19:54:29]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thestig@chromium.org/9212033/4001

[commit-bot: I haz the power, 2012-01-24 22:57:45]

Change committed as 118927