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

[Vitaly Davidovich]

Hi Tobias,

 } else if (Arguments::mode() == Arguments::_int) {

 258     // Interpreter only: we don't need any method code heaps
 259     return (code_blob_type == CodeBlobType::NonNMethod);


Minor point, but perhaps the comment should be amended?

Thanks

On Thu, Oct 2, 2014 at 7:49 AM, Tobias Hartmann <tobias.hartmann at oracle.com>
wrote:

>  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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