tree c150ac60db4f6bd839e4e16620c5046c45f70d75
parent 063a10cf5022911b14d3ce561033bf2ea666d1c9
author Josh Gao <jmgao@google.com> 1492469916 -0700
committer Josh Gao <jmgao@google.com> 1492472762 -0700

sigchain: switch from __thread to pthread_setspecific.

__thread is implemented via emutls on Android, which will result in the
thread local variable being allocated again and leaked if it gets used
after it has been destructed already (e.g. by a later destructor
calling sigprocmask, or triggering a signal handler).

Switch to pthread_setspecific, which doesn't suffer from this problem.

Bug: http://b/36871013
Test: ran dalvikvm on a class that spins creating threads
Change-Id: Ie5deab453be387490ba30a0010e12f60d736c8ad
(cherry picked from commit 99875e9e6b5604cc8a970977d0f531a5035ad55c)