RFR: 8205053: Decouple type registration from framework lifecycle

[Per Liden]

What part of JFR needs to be initialized before I can start to make 
calls to JfrSerializer::register_serializer()? Looks like 
Jfr::on_vm_init() is called fairly late (like long after the heap has 
been initialized), but I'm not sure if that needs to be called before 
other subsystems can start registering serializes?

/Per

On 06/19/2018 10:58 PM, Erik Gahlin wrote:
> Hi,
> 
> Could I have review of a fix that makes it possible to register 
> checkpoint serializers independent of the JFR lifecycle. This is so 
> registration can happen close to where a particular subsystem is 
> initialized. For instance, the registration of the compiler phase type 
> and its serialization could happen where the compiler is initialized.
> 
> Webrev:
> http://cr.openjdk.java.net/~egahlin/8205053/
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8205053
> 
> Testing:
> Tests in test/jdk/jdk/jfr
> 
> Thanks
> Erik