RFR (S): 7009641: Don't use CodeCache for allocations if it is already full

[Igor Veresov]

Seems fine.

igor

On Sep 17, 2013, at 10:44 AM, Albert Noll <albert.noll at oracle.com> wrote:

> Hi,
> 
> could I have reviews for this small patch?
> 
> bug: https://bugs.openjdk.java.net/browse/JDK-7009641
> webrev: http://cr.openjdk.java.net/~anoll/7009641/webrev.00/
> 
> 
> 
> Problem: 
> If the code cache is full and we try to allocate vtable stubs, we have a crash although we could continue execution.
> 
> Solution: 
> Since memory from the code cache can be allocated/released by multiple threads, the cleanest solution is to let the allocation
> in the code cache return NULL instead of failing the entire VM (for vtable stubs). If there is no memory left, no vtable stubs will
> be created and the IC is cleaned. 
> 
> Many thanks in advance,
> Albert

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