RFR(S): 8167299: -XX:+PrintRelocations crashes the VM

[Vladimir Kozlov]

Looks good.

Thanks,
Vladimir

On 10/6/16 9:32 AM, Volker Simonis wrote:
> Hi,
>
> can I please have a review and sponsor for this small fix which
> re-enables the usage of -XX:+PrintRelocations:
>
> https://bugs.openjdk.java.net/browse/JDK-8167299
> http://cr.openjdk.java.net/~simonis/webrevs/2016/8167299/
>
> If we're running with "PrintNMethods" (which is as debug option) a
> call to Relocation::code() in Relocation::method_value() may return
> NULL. We must check this and handle it appropriately.
>
> Also, if running with "-XX:+WizardMode",
> RelocIterator::print_current() calls oop->print_value_on() without
> checking if oop is actually a valid oop. This can be easily fixed by
> calling oop->is_oop() before calling oop->print_value_on().
>
> Thank you and best regards,
> Volker
>