a8a795428a
The SIGCHLD handler can set the errno, which can change the errno found on the thread on which the signal handler is invoked. Most of the time this is harmless, but it's possible that if the main thread was making a system call, and allows certain failures based on errno, that logic can fail. The fix is to save/restore errno in the handler. Bug: 23572286 Bug: 23689391 Change-Id: I4542fd60cc1398ce0a8902d8df98a3d089fb6efe