tree 8725c194845faa6dafb74b621df32f11e49dd85a
parent 423a70c8b9ee012366c11f5d63d8088acd667fb4
author Narayan Kamath <narayan@google.com> 1478535768 +0000
committer gitbuildkicker <android-build@google.com> 1480632408 -0800

Zygote : Block SIGCHLD during fork.

We close the android logging related sockets prior as late as possible
before every fork to avoid having to whitelist them. If one of the
zygote's children dies after this point (but prior to the fork), we can
end up reopening the logging sockets from the SIGCHLD signal handler.

To prevent this from happening, block SIGCHLD during this critical
section.

Bug: 32693692
Test: Manual

(cherry picked from commit e9a525829a354c92983a35455ccab16d1b0d3892)

Zygote: Unblock SIGCHLD in the parent after fork.

Follow up to change e9a525829a354c92983a. Allows the zygote to
receive SIGCHLD again and prevents the zygote from getting into a
zombie state if it's killed.

Contributed-By: rhed_jao <rhed_jao@htc.com>
Bug: 32693692
Test: manual

(cherry picked from commit c7161f756e86b98f2244a04d9207b47149965fd7)

Change-Id: If89903a29c84dfc9b056f9e19618046874bba689
(cherry picked from commit dfcc79ee8ecd4166cba19be7493c6175cb0c65a9)