review (S) for 6976372: # assert(_owner == Thread::current()) failed: invariant

[Tom Rodriguez]

http://cr.openjdk.java.net/~never/6976372/

6976372: #  assert(_owner == Thread::current()) failed: invariant
Reviewed-by:

The full code cache path in the native wrapper has an unnecessary call
to MutexUnlocker which asserts when executed.  The fix is simply to
remove the call.  Additionally handle_full_code_cache assumes it's
called from the CompilerThread but this isn't true for native
wrappers.  The fix is to log to xtty if it exists, which also covers
the LogCompilation case when called from a compiler thread.  Tested by
faking code cache full in the debugger.

src/share/vm/runtime/sharedRuntime.cpp
src/share/vm/compiler/compileBroker.cpp