Add two functions to allow objects that own a file descriptor to
enforce that only they can close their file descriptor.
Use them in FILE* and DIR*.
Bug: http://b/110100358
Test: bionic_unit_tests
Test: aosp/master boots without errors
Test: treehugger
Change-Id: Iecd6e8b26c62217271e0822dc3d2d7888b091a45
This doesn't address `struct sigaction` and `sigaction`. That will
come later.
Bug: http://b/72493232
Test: ran tests
Change-Id: I4134346757ce3a4dac6feae413361cec16223386
Add a new stress test, and fix the code to pass it. We need to ensure that
we reset signal handlers for caught signals before unblocking signals in
the child, we need to ensure that this happens even if you haven't passed
a pthread_spawn_attr_t, and we need to ensure that this happens if you
pass in an empty sigdefault set.
Bug: http://b/68707996
Test: ran tests
Change-Id: I348e9b17b1bdf221591da42c0ada133d98471d66
I don't think there's any observable difference, but this is certainly
simpler.
Bug: http://b/68707996
Test: ran tests
Change-Id: Id9e1a7d40533c90d073ebf391a72bbdfe79627de
