tree 84bf1e0ea17ab7cf118827fbc1b8f32a41b68ff2
parent 2c02e45f4b4ad997ea681993601c9f67bf96a2ca
author Josh Gao <jmgao@google.com> 1557778550 -0700
committer Josh Gao <jmgao@google.com> 1557778671 -0700

Annotate no_return and returns_twice functions.

When building the bionic tests, we use -fno-builtins, which turns off
clang's recognition of vfork as a magical function that can return
twice. Explicitly annotate our returns_twice functions to ensure that
we generate correct code even in -fno-builtins (and while we're at it,
annotate the no_return functions as well, so we generate faster code).

Bug: http://b/131856005
Test: treehugger
Change-Id: I465f8042a965f0c7c03caa5f17af67deea8f5d9d