tree 35a882558d1317078410395829cee67c37846be1
parent b3d3f230fe19870b8dabaad470f6f32330c84996
author Jeff Brown <jeffbrown@google.com> 1296112814 -0800
committer Jeff Brown <jeffbrown@google.com> 1296114414 -0800

Fix concurrency bugs in BCC JIT cache.

ContextManager could potentially be accessed by multiple threads
so we now use a Mutex.

Fixed a bug in ContextManager where it could mark a slot as having
been assigned even though the subsequent call to mmap failed.

Added code to delete the cache file before recreating it.  The existing
file may still be mmapped and executing somewhere else so we don't want
to modify its contents.

Bug: 3345334
Change-Id: I9c8382d9695741b92a4f66c4529ebb5d9a95f1d9