RFR: 8168914: Crash in ClassLoaderData/JNIHandleBlock::oops_do during concurrent marking

[Kim Barrett]

> On Feb 21, 2017, at 10:49 AM, Erik Helin <erik.helin at oracle.com> wrote:
> 
> David, Kim, please see new patches at:
> - inc: http://cr.openjdk.java.net/~ehelin/8168914/03-04/
> - full: http://cr.openjdk.java.net/~ehelin/8168914/04/
> 
> Thanks,
> Erik

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src/share/vm/classfile/classLoaderData.cpp
 144   Chunk* head = (Chunk*) OrderAccess::load_ptr_acquire((volatile intptr_t*)&_head);

Still has unnecessary cast of &_head,

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src/share/vm/classfile/classLoaderData.hpp
 186     void oops_do_chunk(OopClosure* f, Chunk* c, const juint size);

oops_do_chunk ahould be private.

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I don't need a new webrev for these.