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src: introduce node::Realm
To distinguish per-context values from the node::Environment, split
those values to a new node::Realm structure and consolidate
bootstrapping methods with it.
This allows creating multiple realms in a node::Environment. There
can be two kinds of realms:
- A principal realm, comes with a host/implementation-defined global object,
- A synthetic realm, is created by the ShadowRealm API and includes a reduced set of global object properties.
When the changes in this PR are landed with assent, works on migrating BaseObjects to be per-realm native objects and support built-in modules in synthetics realms like ShadowRealm can be started.
Refs: https://github.com/nodejs/node/issues/42528
Initial read through is good. It would be helpful to have a better picture of what the additional coming changes will be. Specifically, how is this going to impact individual BaseObject and internal binding implementation
Initial read through is good. It would be helpful to have a better picture of what the additional coming changes will be. Specifically, how is this going to impact individual BaseObject and internal binding implementation
@jasnell thank you for the suggestion. The overall design of the change can be reviewed at https://docs.google.com/document/d/12_CkX6KbM9kt_lj1pdEgLB8-HQaozkJb7_nwQnHfTTg/edit?usp=sharing. Please feel free to drop a comment there!
Rebased with conflicts resolved and suggestions applied. Please take a look again :)
