logd: validate and fill in socket credentials
- android::pidToUid() additional checking. Make sure if we have to convert a PID to an UID that the parse of /proc/<pid>/status requires a trailing space after the number - android::tidToPid() added, in the same vein as android::pidToUid(). - stats.tidToPid() added - If no credentials, set PID to 0 and UID to DEFAULT_OVERFLOWUID - If credentialed PID is 0, use stats.tidToPid() - If credentialed UID is DEFAULT_OVERFLOWUID, use stats.pidToUid() Test: remove +passcred from logd.rc for daemon and confirm very few UID=65534 or PID=0 cases actually show up Bug: 37985222 Change-Id: I7d20506e70e67beb3043d1537cf9450ab58dc278
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