[9] RFR(XS): 8059559: SIGSEGV at CodeHeap::allocate(unsigned int, bool)

[Tobias Hartmann]

Hi,

please review the following patch.

Bug: https://bugs.openjdk.java.net/browse/JDK-8059559
Webrev: http://cr.openjdk.java.net/~thartmann/8059559/webrev.00/

Problem:
'CodeCache::heap_available' assumes that with '-XX:TieredStopAtLevel=0' 
we only use the interpreter. This is wrong because we still generate 
compiled forms of method handle intrinsics (see 
'SystemDictionary::find_method_handle_intrinsic'). We therefore need to 
create the non-profiled code heap.

Solution:
Change 'CodeCache::heap_available' to create the non-profiled code heap 
if TieredStopAtLevel=0 is set. I also adapted the test ' 
compiler/codecache/CheckSegmentedCodeCache'.

Thanks,
Tobias
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