tree 18970e9d4230a202b38d0b74fa19547c5a02564f
parent 0f71b191492cc63b9c8835e85f6016228889da2f
author Hans Boehm <hboehm@google.com> 1643411222 -0800
committer Hans Boehm <hboehm@google.com> 1643851892 +0000

Remove race on cached thread-name deletion

Manage the thread name using an RCU-like scheme, in which the name
is an atomic pointer to an immutable string, and readers explicitly
maintain a count of active readers. Writers wait until there are
no readers before deallocating a name that was just replaced.

Currently this potentially blocks writers, but readers should be very
fast, and relatively infrequent, so I can't imagine this is a real
issue.

This also replaces JVM_SetNativeThreadName with a stub. This part of
the CL came from Nicolas' aosp/1706702, which this is otherwise
intended to replace.

Test: Build and boot AOSP.
Bug: 37970289
Change-Id: I7e1d13d24adc10b4009d60ee68bc9e837ce78b34