Request for review 6583275: Hotspot crash in vm_perform_shutdown_actions due to uninitialized TLS duri,ng out of memory handling

[Coleen Phillimore]

Summary: Call get_thread_slow() in vm_perform_shutdown actions and add 
null check.

Tested by forcing vm_exit_out_of_memory in current_stack_region (if 
is_init_completed) to reproduce the bug.

open webrev at http://cr.openjdk.java.net/~coleenp/6583275/
bug link at http://bugs.sun.com/view_bug.do?bug_id=6583275

Thanks,
Coleen