RFR(XS): 8232616: JVMCI_lock fails to get initialized when cds is disabled

[Ioi Lam]

Hi Jie,

This looks good. Thanks for fixing it.

Thanks
- Ioi

On 10/18/19 5:35 AM, Jie Fu wrote:
> Hi all,
>
> JBS:    https://bugs.openjdk.java.net/browse/JDK-8232616
> Webrev: http://cr.openjdk.java.net/~jiefu/8232616/webrev.00/
>
> When cds was disabled, many tests in compiler/aot and compiler/jvmci 
> crashed due to SIGSEGV in Mutex::unlock().
> For the list of failing tests, please refer to the JBS.
>
> The reason for these crashes is that JVMCI_lock fails to get 
> initialized when cds is disabled [1].
>
> I suggest to fix this bug since aot and jvmci seem not to be dependent 
> on cds.
> Could you please review it and give me some advice?
>
> Testing:
>  - The list of failing tests due to this bug  on Linux/x64
>  - make test TEST="tier1" CONF=server-release on Linux/x64
>
> Thanks a lot.
> Best regards,
> Jie
>
> [1] 
> http://hg.openjdk.java.net/jdk/jdk/file/2e0462f4cf4e/src/hotspot/share/runtime/mutexLocker.cpp#l339
>
>