RFR: 8202364: Add GCConfig::hs_err_name() to avoid GC-specific code in error reporting

[Per Liden]

On 04/27/2018 11:50 AM, Aleksey Shipilev wrote:
> On 04/27/2018 11:48 AM, Per Liden wrote:
>> On 04/27/2018 11:40 AM, Aleksey Shipilev wrote:
>>> On 04/27/2018 11:39 AM, Aleksey Shipilev wrote:
>>>> On 04/27/2018 11:33 AM, Per Liden wrote:
>>>>> The gc_mode() function in vmErrror.cpp currently tests which Use*GC flag is set and translates that
>>>>> into a name. We should instead call into GCConfig to get the name. This patch adds a new function
>>>>> (GCConfig::hs_err_name) for this purpose. This is not placed on CollectedHeap, since we might need
>>>>> this name before a CollectedHeap instance has been created, e.g. if we crash during VM startup.
>>>>>
>>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8202364
>>>>> Webrev: http://cr.openjdk.java.net/~pliden/8202364/webrev.0
>>>>
>>>> Looks good.
>>>
>>> Wait, except you want to keep the human-readable?
>>
>> I though it looked ugly with the space so I removed it. I don't think it makes it less readable.
> 
> The line where GC name is injected already have spaces:
> 
> Java VM: OpenJDK Server VM (slowdebug 10-internal+0-adhoc.user.shenandoah-jdk10, mixed mode, tiered,
> g1 gc, linux-x86)
> 
> I prefer not to change formatting unless there is very compelling reason to do so.

Sure, keeping the original names.

http://cr.openjdk.java.net/~pliden/8202364/webrev.1

cheers,
Per