tree 64958a4d48a6c1b3aa235dda0fbd39066f555582
parent e332742721ba26759c44709a4ad7f9a829544903
author Daniel Micay <danielmicay@gmail.com> 1464724868 -0400
committer Daniel Micay <danielmicay@gmail.com> 1464731312 -0400

expose control over unpriv perf access to shell

This allows the shell user to control whether unprivileged access to
perf events is allowed.

To enable unprivileged access to perf:

    adb shell setprop security.perf_harden 0

To disable it again:

    adb shell setprop security.perf_harden 1

This allows Android to disable this kernel attack surface by default,
while still allowing profiling tools to work automatically. It can also
be manually toggled, but most developers won't ever need to do that if
tools end up incorporating this.

Bug: 29054680

Change-Id: Idcf6a2f6cbb35b405587deced7da1f6749b16a5f