[9] RFR(XS): 8042570: Excessive number of tests timing out on nightly testing due to fix for 8040798

[Albert]

Hi,

could I get reviews for this patch?

Bug:
https://bugs.openjdk.java.net/browse/JDK-8042570

Problem:
The fix of JDK-8040798 introduced a lock (MethodCompileQueue_lock) prior 
to accessing the compilation queues
of C1 and C2 in CompileBroker::mark_on_stack(). 
CompileBroker::mark_on_stack() is executed at a safepoint.
The locks that I introduced can cause the deadlock, since the 
MethodCompileQueue_lock lock is held at a safepoint
that is reached from ciEnv::register_method(). This causes the deadlock.

I verified that deadlock happens as described above using the 
Redefine_v52_strict_invoke_redefine test.

Solution:
Remove locks in CompileBroker::mark_on_stack().

Testing:
Failing test cases.

webrev:
http://cr.openjdk.java.net/~anoll/8042570/webrev.00/

Many thanks in advance and sorry having introduced this bug,
Albert